Please read this  **This article was written for the old Fastpass system but the tips and strategies still apply** How to use both the DAS and FP systems together Coordinating the DAS and FP from Autism at the Parks (Thank you Maureen Deal for allowing this link)

The DAS accommodation will remain active for 60 days.

No. You only need to request the DAS one time during your stay.  It will cover all the parks with the exception of the water parks at Walt Disney World. And it covers both parks at Disneyland.

You may use the DAS in conjunction with the new Genie+ system. The 2 systems work separately in your account and do not interfere with each other. However, you may only receive one DAS return time at a time. You will not be able to receive another return time for a different ride until the first one is redeemed.

Yes, you may have multiple DAS holders in your group. You will still only get 1 return time at a time assigned to the guests in your group. Since the system is electronic now, you cannot receive 2 return times linked to 1 DAS holder or any member of the group. Each member of your group can be placed on each DAS and you can choose who in your party is riding with which DAS holder. [...]

The DAS covers everyone in your travel party, for the 4 main parks in Florida and the 2 parks in California, for the entire length of your stay. The policy used to state that only 6 were allowed on 1 DAS – however, that statement seems to have been removed from any print. Some cast members may still only put up to 6 on your loved one’s DAS but many will do the entire party. Disney [...]

The return times for the DAS do not expire! If you cannot make it back by the return time, don’t worry. Just get there when you can and enjoy the ride at that time.

At Walt Disney World and Disneyland: The accommodation will go into your My Disney Experience account – a button will appear in the app in your account. This button does not appear until you activate your park ticket for the day and will fall off at midnight. The button will reappear the next time you activate your park ticket for the day. Sometimes it takes a couple minutes after you enter the park for it to [...]

If you use a wheelchair or scooter, you will not need the DAS unless your needs go beyond what an EVC or wheelchair can provide for you. Depending on the attraction, guests using a wheelchair or scooter will either wait in the stand-by line, receive a return time at the attraction comparable to the current wait time or be redirected to an alternate entrance.. The majority of the attractions at Walt Disney World offer queues that [...]