Check out Jeff Schultz photos of dropped dogs /transport planes from Manley , Tanana and Galena checkpoints March 7th, 8th, 9th and 10th (scroll down), especially March 10th photos of interior of the plane .
http://iditarod.com/photo/Educated guess based on the info Tangles posted and Schultz's photos that the dropped dogs in Manley and Tanana checkpoints were flown to Galena dog drop area before being loaded on the plane that transported them to ANK.
I always thought dropped dogs were flown out on individual IAF planes from each checkpoint directly to ANK or Nome ASAP. Obviously not this year .. maybe because of the logisitcs scramble when ITC decided on short notice to re-route the restart to Fairbanks ?
Expect the usual from the ITC PR machine .. deafening silence.