What size is too big to not wear shorts?

I know I'm kind of "big" like.. .as in over weight, [like a size 10 or 12. I'm 17] But I'm going to be working at a summer camp this summer, and I'm wondering: Is that too fat to wear like.. Athletic shorts? I use to wear boy shorts, but I think they're kind of gross now. Can I wear normal shorts? I always went for caprees or burmuda shorts because I didn't want to be that fat girl wearing too flashy or tight of clothes [we all know that person right?] but I'm going to be quite active, so Im thinking athletic shorts are the way to go... But I'm still a bit.. iffy or insecure about it. Any advice? Thanks!