Terry, I can recommend Celebrity, esp. the Zenith which we enjoyed a lot going through the Panama Canal. Most of the newer Princess ships are good, including the Grand Princess, although the showroom leaves much to be desired for wheelchair users. I have not been on the newer Royal Caribbean ships but have heard very good stories about their access...even lifts in the pool. Currently I am withholding any recommendation for Holland American until we return from our next trip, which is with HAL in South American in November. Carnival is more crowded with smaller cabins and I would not recommend this line for disabled cruisers.