I am also running the Goofy as well....I have to disagree on one point..if your husband leaves EARLY and does drive it won't be that bad. Last year, I drove in to the EPCOT parking lot on Saturday for the half, and there was NO traffic at all! I got there about 4:30 am, and I drove right into the parking lot and parked. Since he has to be there early anyway, he should be OK.
When I ran the marathon on Sunday last year, I took the bus and let my fiance use the car to come watch. He drove over to EPCOT just after 5am and also just drove right in without traffic. He watched me at the start and 4 mi mark, then walked over and took the monorail over to the TTC where he saw me. After I went by there he walked over to the Poly and waited for me there. After I went by him at the Poly he monorailed back to EPCOT and waited for me there until the finish. He didn't want to risk taking the bus to AK and missing me by not having time to get back to the finish. There is actually a spectator viewing tool on the Disney marathon website that can help you out. Also, when your DH gets his goody bag, there should be a spectator viewing sheet in there (at least there was last year)..it was really helpful to my fiance when he was watching last year.
just read again and realized he is doing the half...I was a specatator last year for the half, and I was able to park and take the monorail over to the TTC, which is a great viewing spot, then over to Poly and back to the finish. You have to move fast to get from the Poly back over to the finish, but it is possible depending on how fast your runner is.
Have a great time..less than a week to go!!