Our 16' C-dory "Cachita" had the full complement of electronics less AIS. There's a premium of space to install everything on a 16' Cruiser. I would suggest installing an integrated unit.
Keep what you can to a minimum. If your electronics do fail, a ditch bag with a spare GPS capable...
If you are an Alaskan resident, give Alaska DMV a call & check if you can register a boat from outside. If principal use of the boat is in Alaska, you should be able to get your registration from Alaska.
The Alaska Boater Handbook (2012) should give you all the info...