IMHO I would forgo the sheet, can't really say I remember to much of the sheets under me way to much going on top of them, but a thought came to mind, how long will you be there and who the heck is going to wash that sheet and get it back to you? :huepfen013:
We're a lot like you guys...last trip to TTR we went with another couple and paid the extra to stop at WalMart. We ended up getting some snacks, etc. but the snacks quickly got nasty (due to the high humidity). It costs $ 30 extra for the stop at WalMart and honestly don't think we'd save enough $$$ getting stuff there vs. the tiny bit we might purchase at a local convenience store. Just our 2 cents though...