Would you be creeped out about this too? And what do you think these people were up to?

This was a memorable night. Couple years ago my 2 best friends (gay couple) and I went to a couple of creeks down some gravel roads. It was after dark. We stopped at this one that was on a rickety old road, got out, brought our flashlights and a blanket and laid on the rock bed and looked at the stars. We were there probably more than an hour. We smoked some weed, we talked a lot, talked about aliens and all kinds of stuff, I remember Josh being goofy and letting out a "bigfoot" call really loud, we laughed about that. We also laughed because he farted and then I was imitating the sound of it. We were so far out in the wilderness that something was mentioned that maybe someone would hear us, but I said there ain't no one out here but us, I said, no one would be down this old road after midnight but us. Josh heard a sound from the woods right beside us but Justin and I didn't. We shined the flashlight, but couldn't see anything and didn't hear anything else. Went back to talking, then about 30 minutes later we all heard it, Josh said that wasn't the sound of an animal moving around, it was foot steps. We all freaked out and ran back to the car. We took off and right there around the corner was a van, didn't even see it when we pulled up. So there WERE people out there in the woods! This was so creepy to me knowing someone was just sitting there waiting for us to leave. Usually if someone else is out having a night out at the creeks, they will just stay where they are and say hello. Then we started thinking back to all the dumb stuff we were doing and laughed about that, the bigfoot call, the fart, the alien discussions. lol We have had some creepy incidences getting out there at night in the last 10 years. Been chased a couple times, thought we were going to get shot lol good times