Really? I always find the prices at the airport cheaper. I'd rather lose 10-20 minutes off the start and end of a a trip (acutally a wash, because it is faster to drive directly to your hotel) than lose 30+ minutes 2x mid trip.
For me, where it got tricky was IF I used the CCC (was going to do this mid-day) was having to drive back to ALK to pick up the carseats, and then the rest of the family. Couldn't make it work, so renting from MCO. Now, the rest of my party will probably take ME (for the novel, fun part).
I'm wondering if I should 'check-in' with ME BEFORE picking up my car?