You know the best place (in my opinion) to scream team for the 1/2 is? Mile 8-9 around the Grand Floridian and Polynesian. It's easy to get there (monorail to the Poly and then walk out the parking lot), not a ton of people there, so it's not super crowded, and that's getting to the hard part of the course: the fun of the MK is over and you still have a few miles to go. Stephen and my Dad cheered from there in 2006 and it was HUGE having them there at that point in the race for me. Actually what Dad and Stephen did for Mom and me in 2006 and what Mom and I did for Stephen and Dad in 2007 was drive to Epcot, take the monorail to the TTA, walk out by the dog kennels, this is mile 4, after your runner crosses that point, walk across the TTA into the Poly and across the Poly parking lot, this is mile 8-9, after your runner crosses, walk back to the Poly, monorail to Epcot for the finish. This works for the full as well as it is mile 9, mile 11-12, and then the finish.
Pat--We'll be at the Pop and I'll have a car if you need a ride. Since it's just me (Stephen's taking the provided transportation), I'll have room for 3 or 4 people, depending on how crowded those in the back seat want to be. The only down side is we are checking out of the Pop and into SSR on Sunday, so we won't be driving back to the hotel after the marathon.