Thank you all for the replies . My grandson can walk just not for long periods and will have no issue with standing in lines. My main concern is anything with stairs. I think our best solution is to just let a CM know he is unable to do stairs on any ride that may have them. Thank you all so much
I would still strongly advise a stroller as a wheelchair tag.
Always better to have it and .it need it. But keep in mind some of the queues are extremely long, even on the FP side. For example, Soarin is 3/4 of a mile on the FP side, so even longer on the standby with switch backs and all.
FOP is another extremely long queue, although I do not know how long on that one.
Pirates is about 1/4 of a mile on the FP side
Big Thunder is lengthy, but there are also about 4 or 5 small steps up at the entrance.
There are many others and you might find that he might be able to do some of the shorter waits individually, but by the end of the day they may be too hard to do.
As for stairs, here are the attractions where the queues have stairs that I know of:
Splash Mountain
Big Thunder (four or five small steps)
Space Mountain (Standby queue only)
Tommorow and Transit Authority has a speed ramp, so no stairs, just be aware the ramp is steep, so he may need some support while standing on it, but even with the tag the stroller wouldn't be able to go up that.
I am not sure if there are any stairs or steps in the queue for Kilamanjaro Safaris, as I have always veered off for either the wheelchair vehicle of the FP queue, never been through the fully standby queue.
Also, if you plan on seeing any of the circle vision films, you probably would want the stroller as a wheelchair tag, as that would be standing for around 20 minutes without it.
Note in the land pavilion, there is an elevator, which may be easier than the escalator.
There are stairs at all of the outdoor shows and the Festival of the Lion King as well, there are accessible seating for these, which you could request, but I have seen CMs refuse if there isn't a mobility device, so the stroller as a wheelchair tag would be helpful at the shows as well.
I am not saying you have to get it, just mentioning where I can see issues based on what you have described, I really would recommend a stroller as a wheelchair, because if it gets too much it may be a life saver for you.