OK, just my $0.02. Can't speak to the west side launches, if convenient, go for it!
Would not launch at the Twin Bridges ramp on a bet any more, especially if crabbing is open. The influence of the current and the bridge obstructions right out in front make this a nightmare if you have to try to hang waiting for the ramp to clear out. BTDT, YMMV.
Two best options on the east side: Everett and Bellingham. Both have great launches and ample parking. Everett has the best arrangement of ramps and approaches. Bellingham gets a nod for the free parking, and always has overflow on Hilton, which many people are not aware of. If you are out for more than a couple of days, you have to get a free permit at the port office.