The kids all pile into the car and then Cindy gets in the back with Alice, saying she got pushed out the other end. Less than a minute later, Cindy is in the front seat with Carol, saying she has to go to the bathroom.
In the scenes inside the tents, there appears to be a fabric floor under the sleeping bags, but when the boys chase the girls into their tent after "the bear", there doesn't appear to be a bottom to the tent. Also, Carol's sleeping bag was nowhere near the opening of the girls' tent, but when the tent collapses, the sleeping bag is right in the opening.
As Jan shines the flashlight on the paper cutout of the bear Marcia is holding, Marcia's hand and arm are not seen in the resulting shadow.
A lot of the dialogue in the outdoor sequences is re-looped.