Price out a one day car rental, sometimes they can be price competitive with a cab. There is no shortage of relatively nearby shopping for OKW. There is a super Walmart, several Publix and a Winn Dixie. The closest real grocery store is Gooding's, but I recommend you avoid it. Nice store, but prices are outrageous. Definitely geared for the tourist trade rather than the locals.
The Super Walmart is nice, but is reported to be the busiest WalMart in the US. I believe it, parking is a problem and the lines for registers are LONG. I prefer to shop at one of the Publix, nice stores, good quality, average prices, and it saves time...and on vacation time is a commodity in itself.