Can't speak for the USAF, but over here its easy getting a transport job.... after all, its not much harder than FS04!
When you go for the interview, definitely tell the recruiter that you intend to use the air force as a stepping stone to commercial flying. This won't work against you, you'll earn bonus points for being honest. They like to see applicants with initiative.
And you are definitely correct in presuming that 'Fighter pilots go to different training as the Tanker Transporter pilots'