and btw, in the camp i go to, its unheard of to play ball on shabbos
So, you can personally vouch for *every* camper, staff member and visitor to your camp on Shabbos that they won’t do *anything* that might be considered improper on Shabbos? I don’t think you (or anyone else, for that matter) can provide such a guarantee.
I think you shouldn’t take the chance. Shabbos is Shabbos and it is unadvisable to play with shabbos.
The Wolf