What we have been doing is park in the free lot at the Buena Vista Palace across from DTD. Yes, it is a longer walk to The Boathouse. But I can assure you, it's faster than trying to get into the garage or surface lots at DTD with all the traffic that is there right now.
We have eaten there several times and enjoyed these on our last visit, just a week ago today actually. We enjoyed everything we had and then some. One of the better restaurants Disney has opened recently.
Starters: Florida Stone Crab Claws & Firecracker Shrimp
Entrees: We shared the Beach & Sea Lobster Bake
My wife has had the Seared Tuna in the past and it was very good. The Jumbo Lump Crabcake was very good (to me) as well. The Hoisin Glazed Wahoo is also very good as well.