There is a Walmart pretty close to the property. There are also plenty of grocery stores for you to pick up some things.
I admit I'm confused by the rest of your post. Are you asking if someone from your hotel would drive your rental car back to the airport for you? You will need to drive your car back. And you don't be able to take ME back to the hotel if that is what you are asking. ME is for your arrival and departure days only.
Don't know what you are looking for in terms of shopping suggestions. If you are looking for things to have in your room....a case of water is a must buy (it's super expensive in the parks). You could also get soda/juice/milk and breakfast items and that will save you a lot of money in the parks. We also bring our own snacks into the parks.