When SharkChow did the UF in 2006, you are correct in that there were blue bins/barrels for each participant for resupply at the stage points. The logistics of having the bins at various stage points when each person arrived was probably a bit much --- truck or large vehicle needed to carry all the bins --- assuring they'd be at each checkpoint within a reasonable amount of time after participants arrived --- getting someone else to pick up a couple of bins and get them to those who were far ahead/behind others. While it would be nice, I can see why Chief dropped it.
I believe your support person can take you for resupply, but they may need approval from the CP Manager first. I'm not sure they can resupply you (bring you pre-arranged food/items) - only drive you to, say, a Publix, West Marine, or WalMart for resupply - or laundromat ... or watch your boat while you take their car to go resupply. Hopefully Chief will pop in here to clarify.
If you check Google Earth, there are a number of food stores, one or two WalMarts, and a couple of West Marines along the way where it would be safe to leave a boat (I would, however, take your electronics with you) for a short jaunt to the store to resupply yourself.
So, SewSew, are you going to need five or six hoagies taped to your bowsprit to make it around the state?