You all are reading too much into my question with all the scooter talk. And the gentleman who is concerned about the beds that was cruel and really hurt my feelings. My husband and I are taking our daughter, son in law and 8 year old grandson on a week long trip but my husband still has to telecommute from the villa during the day and will be joining us for dinner and a few rides a day. I asked a specific question that no one seems to know the answer to since none of the replies were from people of similar stature. (excluding the one very kind lady who sent us to her posts and she is still quite a bit smaller) I'm trying to select FastPass+ based on what will be comfortable and hence enjoyable for him.
I am so sorry that no one here can give you the specific information that you are seeking. I truly hope that the posters with the concerns for the bed an chairs where not being rude, but just trying to bring up an issues that could possible cause injury to your husband and embarrassment.
I can not give you first hand experience but I do have a friend that goes often. She is not as tall as your husband, 5'8" but she is near 430 lbs. I asked her to think about some of the rides that she skipped or caused trouble and below is what she sent to me. I hope that it may help you some. Also she does not use a scooter or wheelchair when she goes, but she did say that by the end of her trip her knees and ankles suffer from the extended walking. I will post again when she gets me the rest of the information, she only gave me Magic Kingdom for now, but if you have a question about a specific ride please let me know and I will ask. She did ask me to tell you that most of her weight she carries on her belly and hips. Obviously depending on how your husband carries his weight he may have a different experience all together.
MK:
Haunted Mansion due to the bar I have to have my own ride car so I can sit in the middle
Peter Pan was a no go
Small world they did not fully load the boat with me
Did not do Splash, Big thunder or space mt
Jungle Cruise was a chore getting out. I will not do it again
at tea cups the wheel rubs my belly not a problem but if someone wants to spin they have to ride in a different cup than me
can not fit into astro orbiter
carousel of progress the seats are a bit tight, same with philharmagic and hall of presidents
Buzz lightyear i have to have my own car because i can not squish to the side to let another adult ride comfortably.
people mover is tight
can not fit in barnstormer
Dumbo and carpet belt are tight, but doable, again i have to have a seat to myself
the tree house was hard because the stairs where so narrow, there where people trying to push past me.
under the sea i had my own car again
seven dwarfs was not open during my last trip, but i assume it would be a very tight fit