<human>: Can you summarize the given text in a few sentences?

This is going to really hard to convince them we aren't trying to have a giant orgy or drink/do drugs lol.  
As a way to celebrate our high school graduation, a group of friends (male and female) thought it would be cool to have a camp out in tents in someone's backyard. The problem I know my parents are going to have is the sleeping arrangements. I have not yet had sex with my girlfriend, and definitely would not do that with her, in a tent surrounded by my friends in other tents, in my friends backyard. That would be disgusting. I wouldn't mind sharing a tent with her however, but I know my parents are going to say that it's inappropriate. She just turned 19 and finished her first year of college. My friend's parents are going to be home the whole time, so obviously we aren't going to sit around doing drugs. This is really just innocent fun. We are planning on playing basketball, sitting around a fire, roasting marshmallows. We even have to watch our language because one of the girls is a Mormon and gets really offended easily. I don't see what their argument could be against this.
<bot>: How can I convince parents to let me going camping in my friend's backyard, supervised by his parents, and possibly share a tent with my girlfriend?