Bigger guy with smaller dick

I am a little of a bigger guy with a protruding stomach and man boobs and a small dick soft. Going to a friend's place in a couple of weeks and we're going to a gay campground , nudist cookout and nudist resort the weekend after. I am kind of self conscious about everything being my first nude experience with others , those I do not know other than my friend. Trying to keep a positive , confident attitude about myself , but still a little self conscious about my looks. Is there anyone like me or have advice for someone with not a model body?