Here's the shuttle schedule for March 17-31st:
Departures (from Wyndham Bonnet Creek):
Magic Kingdom/Epcot (goes to MK first, then Epcot)
8 a.m; 8:30 a.m., 9, 9:30, 10, 10:30, 11, 11:30, 12, 12:30; 2:45; 4:45; 5:45, 6:45, 7:45 plus 8:45 p.m. MK only
Hollywood Studios/Animal Kingdom
8:15, 8:45, 9:15, 9:45, 10:15, 10:45, 11:15, 11:45, 12:15 pm, 3:30, 5:30, 6:30, 7:30
Downtown Disney 3:30 pm, 5:30, 7:30, 9:05, 11:45 pm
Returns:
MK 12:15 pm; 3, 5, 6, 7, 7:30, 8, 8:30, 9, 9:30, 10, 10:30, 11, 11:30 pm, 12:30 a.m. (Transportation Center Lane #74 - it's the same as the place where they drop you off when you arrive at the TTC)
Epcot 3:15 pm, 5:15, 6:15, 7:15, 7:45, 8:15, 8:45, 9:15, 9:45; for March 19, 26, 30 additional return at 10:15 pm. (Charter Bus Parking Lane #12)
Animal Kingdom March 22-26 return times 4 p.m., 6 pm. March 17-21 & 27-31 additional returns at 7 p.m. and 8 pm (Charter Bus Parking Lane #50)
Hollywood Studios March 17, 19, 20, 24, 26, 27 4:15 p.m.; 6:15, 7:15, 8:15, 9 March 18, 21-243, 25, 28-31 additional returns 9:40 p.m. and 10:45 p.m. (Charter Bus Parking Lane #26)
Downtown Disney - March 17-31 Return times 5:40 p.m, 7:40 p.m. 9:15 pm, 12 am (Bus stop #9 behind Cirque Du Soleil)
We didn't use the buses to return to the resorts. They ask you to be at the designated area 10 minutes prior to departure.
I hope this helps!