This trip my wheelchair seemed to be a problem at every sit-down restaurant that we went to. When we made our PS's, we told them that I was in a wheelchair and when we checked in we also reminded them. Which always felt sort of silly, as I was sitting in the wheelchair when I told them(smile).
And then we had to keep repeating to the host or hostess, that I was going to stay in the wheelchair. This elicited big sighs, annoyed looks and we had to wait again for a table to be available (after being called up that our table was ready). I'm not quite sure what was going on in the restaurants that caused my wheelchair to be a problem this trip. And if it had just been one restaurant, I would have just passed it off to the host or hostess having a bad day. So, I would definitely tell them when you make the PS and again when you check-in. And if you aren't going to transfer to a regular chair, let them know this when you check-in.