Gail & rod
The Emerald is an older ship and was never really designed for wheelchairs. there are however a few handy points that should help you both.
Ensure that at port, the crew are aware that Rod has a stick, the gangplank is hard to walk up and down for many people. There is a crew access point on deck 2. This offers a reasonably flat exit point at any port except tender ports. This is not always made apparent to everyone. The entrance to this access point is via a door on deck 2 directly opposite the lift, but does involve a bit of a walk from there through to the exit point, with an uneven floor.
Secondly, if they cannot get you a cabin near a lift, there is a small ray of light. Always travel from cabin to lift via the resturant and show lounge deck. This is the one floor where there are ample seats all the way from front to back of the ship, so no matter how far the lift is, you can rest as many times as you wish.
Another good point is, at the evening meals, don't queue with all the people down the hall. One, its pointless, two it means standing around. You can either sneak in the back door of the resturant (near the trees at the end of the queue) or wait in the bar till the queue goes down.
Andy