Camping Sc/out/s, need your help with Campground essentials!

I'm the co owner of a campground, while we are small we have a big pavilion and over 70 yearly nonelectric/electric campers

This summer we will be opening up our shower house with a separate store.

We know the essentials such as soap, water, ice etc, but I'm still looking for ideas on what food in general should be stocked or items that arnt usually available at campgrounds but should be.