Trail’s End is a DELICIOUS buffet restaurant. Crocket’s Tavern is nearby, which I believe does take-out pizza. To get there, you can either walk if your campsite is near the Settlement (or you’re in the mood for some exercise if it’s not), or catch a bus. They have internal buses that run between the Settlement (near the marina) and the Outpost (where you check in and catch buses to other parks) and stop at campsite loops along the way.
There are also trading posts at the Settlement and near the Meadows Swimming Pool that offer snacks, basic camping supplies, etc.
FW has Hoop-Dee-Doo, Mickey’s Backyard BBQ, and smores at Chip & Dale’s Campfire Singalong too!