Jonocrab

Same goes for the table that may be in the room; if it is getting in your way and will give you more space, especially with a wheelchair, you can ask your steward if they could remove the table from your cabin.

Your other option would be to keep the bottom bed split and go with something like:

 

This is an example photo I found on google, just to get an idea what the overhead bunks look like though.

The overhead bunks are pullman beds. They get stowed in the ceiling/wall during the day.