We had a boat in Reno, Nevada and took the dogs out on Lake Tahoe and Eagle Lake, CA. That boat was a 19 ft Bayliner 195 and was a good all around boat for us and the dogs.
Another Sunday we ventured further out over to St John and anchored up to a nice beach.
Another weekend, back to Christmas Cove but this time we took a mooring ball on the East side of the cove and found that beach to be sea urchin free!
So many things to do with the dogs and if you don't go out on the boat or go to a dog friendly beach you can always just go in the pool!