We stayed last Nov ( and booked FD for this Nov) and honestly, the bus situation was the worst part of our trip.
We ended up taking a taxi for 4 of the last days because we waited for over an hour once for a bus and missed reservations.
I was so bad in my opinion, that I did not deem it safe for my family to pack as many people in at the end of the night, hang on for dear life, a have 2 tired kids having to stand because a 20 - 40 year old man would no give up his seat for even an elderly.
Renting a car this year. It will cost an additional $200 or so BUT I am savinf $1400.00 on dining so the money will go toward that AND with staying a a resort, FREE PARKING at all the parks!!!
Not saying it is the solution, but for my family, it will be.