Here's my dilemma ... I'm definitely going to book round-trips to Germany for me, my wife, and my two step-kids. We'd depart from, and return to, ORD. On the tail end of that, I would like to tack on a "free" (actually something like 2500 miles) one-way to Hawaii ... but just for me and the wife. I don't think I can book four people on one reservation, two of whom have an additional segment on the end, ... can I? The other way to go would be to book two reservations: one for the kids terminating in ORD, and one for us with the extra segment. They'll be 16 and 17 at the time, and it appears that United's policy will allow them to travel "as adults" if we want them to (i.e. not "unaccompanied minors"). That may be the way to go, but if we're on different reservations, what happens if something goes pear-shaped along the way? Any insight would be appreciated.