I have never had to wait in a line to rent a boat at 1:00 and that is about the time I rent myself. The boats themselves are very safe and a real hoot! I use to do the little 2 seater Sea Raycer but now I rent a Pontoon Boat. Take my camera and something to drink and just take my time, cruise around, taking all the pictures I can and just relax. As I have gotten older I have found I like the Pontoon Boats alot better but ask a few of my nephews and the'll vote that right out the window and go with the Sea Racers hands down...
There are life guards that patrol the area in speed boats and when they see travel or horseplay to close to the Ferry or another boat, they go right to the person causing the problem and it stops. I know, 2 of me nephews were messing around a little to much, they got a visit by the patrol and were told to stop or they would be made to take the boat back to the dock...
There are other things you can do on the water as well.. Sea-doo's for one... but you can only rent those at the Contemporary. I have rented from all 4 of the resorts on the Lagoon but I like the Grand Floridian the best now.