We stayed at POFQ when DS was still on a bottle. I used the microwaves in the food court or the baby care centers (stovetop, bottle warmers etc) in the parks when I needed them. I did not use tap water for DS as the odd taste was noticable to him. Depending on your bottle type, the coffee pot would work too.
I also brought the medela microwave steamer bags to clean his bottles, also those pre-soaped dish soap pads, cut up in pieces (didnt need a whole one each day) for cleaning them!!
Have a great trip! 8 months old will be a great age for Disney! Old enough to like to look at things but young enough to not want to get out and run around everywhere!!