Yes, Cali is horrible for drivers and cars. However, we have a *permanent* trailer registration. Register it once, and your done. I just went through it last year, and it was fairly easly. I had some manufacturer produced paper, w/ some numbers on it (no title). They verified the numbers, and gave me the permanent plate/title. I don't know how much i paid for it, but i don't think it was much. Also, i have no idea if they allow out-of-state reg....just found this CA DMV page on it:

http://www.dmv.ca.gov/pubs/vctop/d03/vc5014_1.htm