It's funny you mention WL. As far as I know, your two best choices for getting from HDDR to DTD are:
1) boat from FW to WL, then bus from WL to DTD;
2) FW Internal Shuttle from Pioneer Hall (where HDDR is) to the front of FW, then bus to DTD.
I have no idea how often the FW Internal Shuttle runs. As far as option #1, maybe I'd be LESS apt to do that if the boat from FW will stop at MK before going back to WL. I've heard that they switch directions at some point, but I really have no idea. The only time I took the boats was for the early HDDR last May, and the route was MK-WL-FW-MK-and so on. But if it goes in the other direction AFTER your show, I'd go that way, take the boat right to WL, then bus it from there to DTD.
Any way you get to DTD, your best way back to WL is going to be bus.
Of course, you're always free to take a taxi, but taxis are always not free.
