The concern about the downtown area is that much of it is built on fill sluiced down from the post office hill, so when things start shaking liquefaction will cause those buildings to collapse. Many of those buildings had their original ground floors buried as a result (been on an underground tour?) so they may actually be stronger as a result, but building codes for seismic resistance are relatively new, so get out of downtown if you can. The tribe's architects no doubt will take this into consideration, and footings will be dug deeper than the fill. They'll probably be safer than the old buildings. Any wave that survives crashing on the hook will likely dissipate a lot of its strength there, but pilings along the shore will still be a good idea to knock down any waves that make it across the harbor. The tribe's  hotel will cater to gamblers coming to be shuttled out to their rez casino so the added risk of sleeping in a tsunami zone may actually be attractive to them. ;-)