I travel a lot and that was an issue for me as well, but I simply timed it to send in at the start of a 6 week home period. The shipping label is good for 90 days.I haven't sent mine in yet, been afraid that nobody would be home to sign for it. I just may not and wait to see what comes out for replacements. I'm really not afraid of the whole AD as many.
I sent mine in last week and expect it back this week or next. My understanding is that the return notification will state the delivery and time (after 4:30 or something like that), so I just need to plan accordingly when I get the return notice.