
Its looking like the family may be taking a quick family trip to Disney World. I am being setn for a 4 day event for work that will keep me occupied all day (7am-5pm). The wife and daughter plan to hit the parks while I am working

f4
f4 IS
f2.8
f2.8 IS II
The f4 is dirt cheap to rent, the f4 IS is well in my price range to rent as well as the f2.8, the f2.8 IS starts pushing what I want to spend.
Whats everyones thougths, we plan to spend a evening in each park with a full day in Epcot and half day at Animal Kingdom. The wife will just be using the PS during the day while I am working. She does not like using a big camera
I would not bother with renting a 70-200 for the trip, your 55-250 should be fine you whatever you want to shoot in that range. I am assuming your would be using it during the day as even the 2.8 is not fast enough for shots at night.
My recommendations to you would be to rent a wide angle as you have planned and also I a Sigma 30mm 1.4. Based on your signature, you don't really have anything fast enough to capture the night time parades or indoor rides. Maybe just put the money towards buying a 50mm 1.8. Your existing kit and a fast prime is what I used for many trips to Disney World. I just felt that 50mm was not wide enough, which is wide I use I got the 30mm instead.
My ultra wide and Sigma are the most used lenses on all my trips to Disney since I got them.
oh ya, bring your tripod.