Here's some info from Oasis Montana about solar/DC fridges/freezers. They seem kinda pricey to
me, but might be able to be resold, when your requirement is done, to recoup some of the cost.
or an lpg powered option, also not cheap, but looks useful and is compact
Or, if you did have room for a small propane tank, you might get a portable camping fridge from
C/W or some place like Bass Pro or Cabelas or Gander Mountain. The propane powered camp fridges
generally seem pretty reliable and don't use all that much propane, as far as I know. You can
usually find a refill place unless you're really "out there" some where.
http://www.insideyourrv.com/buying%20an ... ator.shtml
Just some other thoughts/options if the small meds-fridge doesn't work for you.
Good luck with it.