i'm also on the rent-offsite bandwagon. I desperately needed one and magic kingdom had run out so that really put a damper on my trip and thankfully i called, i think it was
buena vista scooters, and by that night i had one of theirs (and for the rest of the trip). it also makes it really convenient for any other place you go, like say you have to take a bus to animal kingdom - that entire time from the bus to the ticket-taking area youre on your
scooter. just make sure you bring the charger in the parks with you. i once had to push my scooter up the monorail ramps with my best friend :X it was quite the kodak moment LOL but in all seriousness, my battery has run out on me before and there are surprisingly a lot of charging ports in the parks (or at least in epcot ive noticed!)