Considering the quads probably the least painless way to get to the parks would be your own vehicle. Except for the launch to the MK, to get to most of the parks you'll need to transfer from the Boone/Crockett busses at the TTC to other busses or the Epcot Monorail. (AK bus loads at the Settlement). Using you own vehicle would give you the flexibility to go and leave the parks at your convienience (especially if you want to give the young ones a break from the parks mid-day)