You don't need to bring it in for inspection. In California
A) Fill out a California DMV Boat 101 form
http://apps.dmv.ca.gov/forms/boat/boat101.pdf
B) Fill out California DMV Statement of Facts (Section G)
http://www.dmv.ca.gov/forms/reg/reg256.pdf
I wrote, "I bought a Rickter Hull kit where I had to assemble the craft to bring it to it's current state".
I also brought in an invoice I made saying "Rickter Hull $X,XXX" then IF YOU WANT add a second line to your invoice saying you paid CA state Tax. Just multiply against your areas tax rate. If you don't show you paid taxes, they will make you pay tax on it there.
C) Bring in some sort of watercraft registration saying you will be using that engine in this craft. By Showing registration it shows that engine meets CA State emission standards. This fulfills section 6 of Boats 101 form.
Of course modify your answers to your situations. It took about 20 minutes once I got got to the counter and ~$30.
If you have questions PM me and Ill call you.
***EDIT (Additional INFO)***
The $30 gets you same day registration and tags. It took about a week for the title to arrive, it was just sent standard mail from DMV HQ in Sacramento.
You will will be assigned a HIN, you need to go out and get a Plate made and attach it to the hull yourself. You can go to a Trophy shop or a Pet Store (Petco) and have them make one for you. You don't have to have it made on a dog bone
There are a lot of clean looking tags you can use. They look great!