DAS for large group question

If both parents qualify then you get 6 for each. I just saw that. Otherwise GS will sometimes make an exception and sometimes not. When they do not, we swapped bands. Now sadly our 2nd group has a medical diagnosis that qualified him for DAS so we have 2 in our group to have it. So I get my immediate family and they get theirs. Advanced reservations cannot be easily modified but they should have each named guest that is allowed. If something is missing and only 1 parent has DAS when both qualify try again to see if they can fix it.

As far as I know the advance reservations cannot be modified online.
Honestly, half the time we don't use them because of the inflexible time window. Regular DAS you can change and adjust times according to the DAS holders needs.

As to additional guests past the 6, ymmv, but we have been able to add additional guests by going to guest services in the park and asking. They sometimes say that is at the discretion of the CM when we check in if they allow the additional person. Never had an issue though.

I don't bother with pre-reservations because it is so limiting. I usually travel with a large family. 7-15 guests. No I do not try to get them all on a das but they take turns. If it is a show, then CMs at the gate will allow one or two extras to join you. It is entirely up to their discretion. I have some CMs who are very strict with the rules. I actually think they're newer and they're not really aware of how they can bend rules. Disney is very strict with its demotion system So there's new cast members are terrified of doing something wrong.. You just roll with the punches. You only have one extra person so I highly doubt you're going to have problems.

Remember with DAS you're booking a return time. That means you and your group can come back anytime after the stated wait time. I know the pre-ranged ones work a little differently and you actually have a time limit to use it. But regular GAS that you make in the park do not have that time limit. You can easily have your dad get a return time that allows you and him to go at the same time you made your mom's prescheduled DAS.

For example, if your mom and five of your family numbers are pre-scheduled for the 2:00 p.m. show, get to the park before noon and have your dad schedule a DAS for himself and one other. With the enough wait time you'll all be able to go into the 2:00 p.m. show.

They're very much like the old digital FP that you would get. As soon as you tap into park, you select which ride you want. Select the guests involved and you'll get a return time. You can use these anytime after the time is up. VQ rides are done as usual (get your VQ at the appropriate time) but when you go to return when your BG is called, find CMs at the ride and swap to DAS so you can use ILL line. There are no DAS for fireworks unfortunately. But for ECV viewing. I cannot personally think of rides excluded from DAS. Even TTA can use it. First day you can open the MDE app and see all the wait times as such. I personally just look at the map and then select the ride I want.

You can hold one at a time. As soon as that return time has been used, you can get another one. As soon as I do my final tap in, I pick my next ride if I plan to do another.

Then advance selections are entirely separate. You can select your first day of DAS as soon as you get in no matter what time (if any) you have an advance selection.

No harm in doing advanced selections but they aren't needed either.