KingDavid asked:
> Anyone know about which end of the mobile lounges to get in?
The end with the driver. You can trample over the other people on the lounge if that turns out to be the "other" end.
HOWEVER
The info from Dulles that I quoted in my earlier message says that you will NOT be required to ride the mubile lounge. It says that your processing will all be done at midfield Terminal C. With very few exceptions (El Al??) all planes are served by jetways at the midfield terminals. Riding the Lounge directly from the plane ceased when the midfield terminals were built some 20+ years ago.
Should you by any chance have to go to the main terminal for Customs etc, you would be herded into special mobile lounges. On the return trip to the midfield terminal the lounges shuttle back and forth frequently. The info I quoted says you won't have to go to the main terminal when connecting from international UA to domestic UA.
Dulles in UA's main east coast international gateway so they want to make it efficient.