USF is about a 2 minute walk from HRH if you take the shortcut out the gate behind the slide in the pool area. Taking the normal path it's about a 5 minute walk. Add another 5 minutes or so to get from USF to IOA.
johare, as usual, is right on... I'm not one for walking long distances and I was SHOCKED at how quickly you can walk from the hotel to the gates of USF! It can spoil you quickly!