Hi Tinkrbell!
If you have a car AKL's Mara is a self serve which might work for getting in and out. But if you are looking at trying to catch something for just yourself to recover from the 5K then they should have choices for you at the finish line.
Stop by the WISH board for those with experience with the WDW Marathon Weekend 5K. There are probably even a couple who did the 5K at MGM in 2007 then booked to WWoS for their kids races

I volunteered at the
Disneyland 5K but different planners from WDW's from what I've since heard. I would 99.99% guarantee bananas will be available though LOL this year thanks to the way they have laid out the races will be my 1st Disney 5K. But I have heard they are tons of fun. 2 of my traveling buddies did the 5K in Disneyland and loved it. Those I've heard do the WDW 5K have equally loved it.
HEY! Check into the Rainforest Cafe. They have a breakfast menu on AllEars for them at the AK location. (I always forget their breakfast menu)
See ya at the 5K, there already are a few DIS WISH people attending. It should be tons of fun.

Happy training!!!!!
Pooh Bear Hugs! My Moms a smoker too. She completed her 2nd 5K this past May. Doing her 1st 6.5K in October at Disney and will be signed up for the AK 5K in January. Sooner or later she'll have to give up that smoking

Glad to hear your Mom did so well on her 5K. I hope both our Moms find themselves doing many future 5Ks. Hope to see YOU at a future Disney race
BTW, the DIS Wish group (under events) also find themselves at other non-Disney races. Disney dragged us in and then we've kept going. So even if you don't have a Disney race coming up but want to hang out with fellow Disney lovers talking running/walking/races that's where they hide out.