The following is a fictionalized account based on some real events. Places and names have been changed to protect identities. All sex is between people over the age of 18.
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As long as I can remember, our family loved camping.
When I was small, I remember my parents borrowing truck campers from friends and relatives, so we could escape to camping areas at nearby lakes. We'd drive up to 4 or 5 hours, set up camp and spend the rest of the weekend fishing, swimming, boating and hanging around the campfire. Even when the weather turned, we'd break out tarps and try to last it out, rarely, if ever going home early.
As time went on, Mom and Dad bought their own camper and truck, then later a motorhome. When my sister and I were in our early teens they bought us each a small tent, so we could have our own private refuge, while still spending time at whichever lake we were at, with the rest of the family. When I was around 14 or 15, my parents bought a lot at new park opening on the shores of a lake that was only about a half an hour's drive from where they lived, which meant we would park the motorhome there for the season (unless we had an event like a family reunion, where it would hit the road again) and my sister and I had semi-permanent spots for our tents. It took a couple weekends to clear some of the trees off the small lot and clear the areas we wanted but it was just the way we wanted it (including a private path through the willows to the beach, which was about 50 feet of sand before the actual lake began) when all was said and done. This all meant that the set up time for our weekends' trip was much shorter, so we could relax that much sooner.
As time went on and my sister and I got older, we'd invite friends out with us for the weekends. My sister was not quite a year older than me, so she was able to get driver's license first and sometimes, after she got a car, my sister would drive us out before Mom and Dad could get away. There were also times when we would come out without Mom and Dad, when they had other obligations, and we would invite some friends and party at the lake; the big rules were don't bug the neighbors, keep it confined to our lot, and stay off the water and no driving if we were drinking at all (my parents were pragmatic in that they didn't allow us to underage drink per se but knew that being too hard line would be counter productive).
Even after we turned 18 and graduated from high school, we kept the tradition alive. After she graduated, my sister worked as a cake decorator in a local bakery and part time life guard at a local pool, but she tried to arrange her schedule so she had most weekends off, and sometimes she'd stay at the lake in the summer during the work week, just driving a little more to get to work.
The summer after I graduated, I was 18 and planning on taking a gap year before going to college. I had been working part time at a local bulk gas station, moving around drums of motor and gear oil and the like, and they told me they give me as many hours as I wanted to work, so it evolved into pretty much a full time thing, and I followed my sister's example and commuted from our lake lot. I'd wake early, start work before 7:00 a.m. and be back out at the lake by 4:00 pm in time to take a swim and rinse off the sweat from work and walk along the lake shore before supper.
I loved being out at the lake as an 18 year old. Even during the week, in the summer there still people there, swimming and enjoying the public part of the park's beaches. Most importantly there were women, some older, some younger but many just the right age, in all types of swim wear, showing off their various bodies. Almost all of them seemed to enjoy being looked at, especially from a fit young guy as long as things remained respectful and discreet, and some wanted a little more attention. I lost my virginity, to a bored married woman in her early 30's while her kids were playing in the playground, just down the road from her campsite. For the most part though, the beach women just wanted to be admired for a short time and left alone. More often (way more often) than not I'd finish my walk a little aroused, and a little frustrated, leaving me to "solve my own problems".
One day, after a walk in which I was especially aroused, I arrived back at our campsite to find it empty. I wasn't sure where my sister was, and to be honest I didn't really care. I didn't see her car and decided to get some alone time. I had seen some very alluring ladies on the beach during my walk, but they hadn't even acknowledged my existence, so now I went into my tent, stripped off my swimming trunks and t-shirt and was fantasizing about a buxom brunette I'd seen, stroking my cock furiously, imagining her sucking it before I fucked her gorgeous ass, doggy-style. I could feel things heating up when I heard my tent flap go up and an exclamation.
"Oh my god! What are you- you're beating off! Here???"