My airline portable visual travel pack contains the following all in one standard overhead compartment sized, carry-on piece of luggage:
Sky 90 Sky Patrol II mount Bogen 410 head Velbon 640 full size carbon fiber tripod legs 4 eyepieces Red light E. Karkoschka's "The Observer's Sky Atlas"
See photo here: http://www.nwlink.com/~filmdos/m111/images/sky90apsys.jpg
This set up ain't nearly as stable as it is on my EM-10USD mount and full timber tripod legs but it gets the job done and I don't have to turn diddly squat over to the luggage mishandlers when I fly.