I forgot to add one major caveat - with winter weather and ORD flow control, I'd MUCH rather route via DFW than ORD. IMO, you do NOT want to be stuck in ORD with 2 - 4 hour system delays; almost happened to me Jan 2, except it would have meant an overnight in a hotel with a scarce room, and waiting the next day - international, not your case, but still a major PITA.

Some have menitoned patterns established by prior use of Eagle or certain departure areas for their usual flights - since you haven't been through DFW in some time, this won't be an issue.

I gave you a link you can use to explore the temrinal system and interterminal transport system. There is a map in the American Way inflight magazine, there are maps in DFW, there are "Ambassador" (or the like) volunteers with little lectern-sized desks to help, and they also have maps. Especially the new LCD monitors are easy to read and clear. Skylink is easy to find, easy to use.

No sweat, no worries.