@jillofspeed I know that a "standing ECV" seems like a good idea - just please approach it with caution.
Personally, *anything* that touches my back in the wrong place will literally result in me spending the rest of the day in the fetal position on the nearest horizontal surface. If there is a back rest, make sure that it won't strike him in a spot that could cause him further pain and problems.
Additionally, the kind of "standers" that Disney allows can be harder to use, first because of the prevalence of textured concretes and pavements, but also because as he goes up and down hills and ramps, his ankles, knees and hips (and all of the associated muscles and tendons) have to do a lot of flexing and holding as he shifts his center of gravity... Going downhill especially can be very unnerving because he will have to lean back to shift his center of gravity. Otherwise, it feels like he will face-plant, because the deck of the "stander" doesn't level out like a Segway. You never really realize how many hills and ramps there are at WDW until you have to use a mobility device!
There's also the need to drive even more carefully than when seated; if he has to stop quickly because a little kiddo hasn't yet learned the laws of physics, and darted right in front of the device - he will have a greater tendency to fold right over the handlebars in a panic stop. So many people just don't pay attention at WDW - we hear stories here all the time about bipedal Guests who are busy looking at their phones, and they walk right into someone in a mobility device.
For parades and fireworks, he will have to move to the back of the crowd, or park it and walk/stand.
Rather than an ECV of any kind, what about a Rollator? It will give him a seat for when he needs it, can be adjusted to his height, so that he has something to hold on to while he walks, and most models are equipped with brakes for going down hills. Also, most of them have a handy basket under the seat to hold his cushion!
A "standard" wheelchair can also function much like a Rollator - and he can use the seat to hold the cushion, so no one has to carry it.
Regardless of what he decides to rent, remember that he can always "park and walk" - ask any Cast Member where to park the device while you explore an area. When you all are ready to move on to another part of the Park, he moves the device to a new parking spot and lather, rinse and repeat!
Lots of folks do this, and Cast Members can always tell him where the closest good parking area for the device is.
As far as bar-type bistro/high top seating, I would maybe ask in the Restaurant forum? I seem to recall a lot of places at Disney Springs having bar seating, but I'm always looking at an accessible pathway, more so than that type of seating because I can't do those higher type of chairs anymore; I have to be able to transfer.
Worried this is just too ambitious.
