The marina instructions were clear, the location is good as far as beach access and access from the water. They have tender service to and from their clubhouse.
They were not able to give local information about the river/canal. They were not able to help me find food. Beware: the restaurant on premises is often closed. We were told it would open at five, and since there was no other food within walking distance (or dinghy distance on a river with current), we waited. When 5pm rolled around, we were given new information: the restaurant was closed for a private event that evening.
(Note: there is a rather nice restaurant nearby, but it's not open 7 days a week, and AYC staff gave conflicting information on whether they were open. Fortunately, I had checked and the restaurant was closed, so I didn't walk/dinghy over there)