We stayed on International Drive and lot of the hotels do a free shuttle to the parks (or it was free to Universal, I think there was a charge for Disney).
We booked through Holidaygems.co.uk it was thousands cheaper then anywhere else, we paid £2400 (October half term) for 4 of us (2A and 2C) for the flights and hotel. The flights weren't direct but there wasn't long waits between flights.
We did 10 nights, and only did the Universal package which included the Univeral Parks, Sea World, Busch Gardens, and Wet n Wild. They were about £350 each I think, so felt like a lot of money to be paying out! We booked through floridatix they were the cheapest when I was looking.
I found Orlando by far the most stressful to plan, as you are spending so much money, I almost had a fear of it not living up to the hype.
It was also a very busy holiday, we got to the parks early (they open at 10) as we tended to be up early with the jet lag, and found we were flagging a bit by late afternoon, so we would go back to the hotel and chill by the pool. Out for tea then fighting to stay awake until 9pm!
The only day we didn't head off out to a park early was our last full day, and by then we were knackered. I think we should have had a break day part way through, but there was just so much to fit in.
Saying all that, we loved it, we were all soooo exhausted, certainly not a relaxing break for us, but we made it that way by squeezing everything in. I do wonder how people manage to fit both Disney and Universal in.