although I really don't know the specifics of Marina del Rey, in
California in general, there is a strong sentiment AGAINST liveaboards.
I'm on lists all over, and it's just not easy. Never mind liveaboards,
try even getting a slip! But, having said that, I do have a 40' and in
some cases it makes it harder, in some cases easier. My take is lay
low, slide in, and you can probably do it. I'm a "sneak aboard" my
self, but hangin in there.

good luck and fair winds