Our camper only sleeps two to 4 people comfortably. Can we pitch a tent for the grandkids to sleep in on our site?

I see why not. Most koas are ok with it. You only have a small grassy area and tge cementvbut it should be good.

You should call n ask, however if I remember correctly front of camper area there is enough room to setup a small tent.

Suggest you call them directly. This is not their website.

Have you contacted KOA ?? Tent sites out back