Great links, baler31! So the wheelchairjimmy site is limited but informative. To help give the OP a slight idea of accessible room availability:
Wyndham Bonnet Creek has 400 total units; ten (2.5%) are accessible, five (1.25%) have roll in showers.
Gaylord Palms does not have suites, but it has 1,416 rooms; 96 (6.77%) are accessible, 19 (1.34%) of those have roll in showers.
Art of Animation: 58/1984 accessible rooms (2.92%), with 19 roll in showers (0.9%)
Coronado Springs: 51/1968 accessible rooms (2.59%) with, according to the wheelchairjimmy site, all 51 having roll in showers
WDW Swan: 23/258 accessible rooms (8.9%) with seven roll in showers (2.7%)