I was actually about to chime in with Colonial Photo! You could also give Harmon Photo a shot...they're right by Ski World, on Lake Ivanhoe.
As for renting, I only know of one game in town. Rummel Wagner, Central Florida Strobe Rental http://www.centralfloridastrobe.com
. He has a small selection of Canon gear for rent, but as the name implies his strength is in lighting gear. I've rented lighting equipment from him numerous times, and it's really top notch. And, he's pretty much across the street from Colonial Photo and Hobby.
Though I've never used them, http://www.rentglass.com
is based near Orlando (Celebration), and supposedly you can pick up gear in person.