Lots of dry ice if bringing ice cream bars.
Or bring ingredients and a ice cream machine- as in the type you shake. Home made ice cream is always great.
Bring a Dutch oven with briquettes and make a peach cobbler in it. (Or any other dessert
Ice cream sounds good as does the Zucchini/Banana bread. Homemade chocolate chip cookies and some good ol vanilla ice cream would be crazy good if you could get the cookies warmed up also.
Keep your glass up, Keep up, Shut up, and pack a hind Q!!
Shut up is said lightly here, but with six people if my opinion wasn't asked, it wouldn't be given.