We were just there last month and I picked up a paper with all the prices listed.
Water mice--$23.00 per 1/2 hour
$32.00 per hour
Canopy boat $26.50 per 1/2 hour
Pontoon boat $37.00 per 1/2 hour
Bicycles--$4.00 1/2 hour or $8.01/hour or $22.00/day
Surrey bikes--$18.00 1/2 hour--2 seater
$22.00 1/2 hour--4 seater
They have other things listed (specialty cruises, fishing, water skiing, canoe, and sailboat prices--let me know if you want those).
We really wanted to rent bikes and head over to Ft.Wilderness but we were just too busy!!
Just another reason to go back next year!!!