The various shopping services are available, Emzed, like gardengrocer.com, wegoshop.com, and the
Amazon grocery option. They all come with a price but you can use the Search function at the top and look for words on the Camping Forum like grocery, groceries, delivery, etc. Or hire an Uber service to the nearest Publix, Winn Dixie, or Super Wal-Mart.
You might want to ask your vendor if they have a crock pot they can give you as part of the rental (add crock pot liner bags to your shopping list for easy cleanup). Then you can mix it up in the pot before you leave for the parks and come back to it being ready for you.
There will be a charcoal grill at your campsite so what I tend to do on my arrival night is to get a big bag of charcoal (add that to the list) and grill several meals worth of meats which can then go into zip loc bags in the fridge and get nuked in the microwave and matched with some side dishes. I cook steaks, chicken breasts or boneless thighs (preferred since they are thinner and cook faster), hot dogs, and burgers (or some mix of these). That's about as long as the charcoal will last. The steaks get eaten on the first night with either some take-out mash potatoes and gravy or french fries from the take out side of Trails End (P&J's Southern Takeout) and a sliced tomato or fresh peaches (or refridgerated mash from the grocer or mac/cheese or potato salad or some other low cook options-you get the point).
Oh and the takeout cornbread from P&J's is pretty good too. Your camper will likely have a microwave so breakfast items like frozen pancakes and syrup, breakfast burritos, and scrambled egg and sausage bowls are options for a hot breakfast. The shopping services, so I hear, will also bring your beer and wine in some cases I believe.
The Meadow Trading Post (and Settlement TP to a lesser extent) have some grocery items but they are pricey and it is limited selection. Good for that "oh we're eating in 30 minutes and I need some milk" and that's about it.
So it can be done - there is just a cost for the convenience however you slice it. Good luck.
Bama Ed
PS - we've also had some recipe threads on the Camping Forum you could search for