I'll throw in my unsolicited 2 cents on the rotator.
1) Your travel office might force you to take the rotator, in which case they'd buy you a ticket to BWI and then you'd jump on the rotator that evening. You are also allowed to stay overnight in Baltimore if you want to. (example: DFW-BWI on Saturday, then overnight in Baltimore and catch the rotator out Sunday evening)
2) The rotator is not a bad deal. When we PCSed to our Aviano last year, I really wanted to fly commercial to Venice, but they wouldn't let us--they made us use the rotator. Looking back on it though, it was so much easier that way. I don't know how big your family is, but between the wife and kids, we had 17 suitcases, and we were exhausted (especially the kids) by the time we landed in Aviano the next afternoon. It was awesome to be able to throw the bags into folks' cars from the squadron and be at billeting in 2 minutes. Even if it's just you and your wife, it'd still be much easier to already be at Ramstein.
Just my opinion.....