[beegnjasmum]

Hi, you go to guest services at whichever park you visit first. Your dd will have her magic band notified as DAS. You don't need to go back to guest services again during the holiday.
When you arrive at a ride, go to the fastpass queue and they'll give you a time to return, e.g. if it's test track and the wait time is 80 minutes then it'll be a similar time for you to return. Then head back to the FP queue when your time is up and you'll join the FP queue.
As far as I remember there's no time limit on a DAS ride, but you can't book a second one until the first one is used.
Hope that makes sense. X