My mom has a heat related problem and has and done get DAS in both WDW and DL. We just returned from DL. She is able to wait inside other attraction, stores and restaurants. How she works her DAS is go early get what you can done, usually two e attractions before it gets hot. Then use you fast pass plus options, and do shows that are indoors between then, like lion king and Nemo when in animal kingdom. Then when that runs out, you can do a charactor meal inside a restaurant for 90 minutes. Then do rides with DAS and or short lines and go into stores while waiting. By then it will be the hottest part of the day, 2 to 6 pm, we choose to usually go to hotel for nap by then. It we go back it is usually to a different park around 7, so we can use DAS. We usually only use DAS for 4 rides a day and usually all rides that have out door lines. Animal kingdom is not the worst park for my mom, although it is bad, our worst is epcot, especially around the world so much is outside. But everyone is different.
Also, my mom for years has had this athletic thing that is blue, you run it under cold water and it last for hours, she throws it on her head, or neck, it works good and allows her to stay in the sun for a little longer, more like walking from land to land, or from bus to ride, not like she can wait outside for long periods of time.
I will admit, as of last year, she has started to rent an EVC, just so she can get from place to place faster, but that is only if it is not a busy time of year, other wise we find it takes longer, because everyone else can move around and look at things, but an EVC person can nver take there eyes off what is in front of them because to many people like to walk right in there path.
It has been over a year since we went to WDW and used DAS so I won't be able to speak to how it works now there. In DL we had the best trip, even with crowd levels of 7 and 8, in 8 days we only found one other person using the DAS pass. And DL, as of when we went and we got back yesterday, we could not use a FP and a DAS pass, if we got a FP and asked for a DAS return time they said not until we used the FP, if we got a DAS return time, out tickets would not allow us to get a FP. If you just get the w/c pass which has no name that I know of, my understanding is you can get a FP and a return time. That was our experience as of yesterday, but again that is in DL not WDW, so I am not sure if what people are telling you is correct or not but a year ago in WDW we could get both a FP and a return time.
you have the best trip!!
