There are a number of hotels near DTD, but they look like longer walks if you ask me.
Also don't forget the PO resorts have the ferry to DTD, so even though it may be a little while, it's still a unique way to get to and from DTD. I'm not so sure about the timing of the ferries though. I don't know about renting boats, I haven't heard about that... Or at least I don't know if they allow you to use the PO boats to go that far down river.
As an adult who has gone with friends the last couple of times, we were happy enough with the moderate accomodations. The pool and bar was great to have after long days, and only once or twice did we spend nights out at DTD anyway. The buses seem quick enough to/from the mods to DTD.