Good advice. You can also call the ship's excursion department and they will gladly give you all the information. They'll tell you which tours will take the mobility equipment. They'll tell you if there are stairs or/and if the path is rocky. I do this all the time. @FOPMan is correct, he will have to be able to get on the bus in most cases. I was on an excursion once where a person was able to drive right up a ramp on to the back of the minivan with their scooter. I only saw that once and it was in Bermuda.