GS: Depends = relates to availability of docks........with a 29' boat You have more options as some slips have max lengths ie; m/b <30.
It seems to flucuate like the weather......really sunny, warmer weekend & you will find it tougher. More overcast & cooler, no problem. I was over there on a recent Sun (7/29) and got a slip around 1:30pm with no problem.....and others were still open. It was a cooler & windy day
Don't forget to look on back side (closer to land) but just watch depth/traffic and if still no slip avail, just hang out for awhile. You will find sailboats tend to turnover their slips faster than powerboats who seem to hang out longer...........PLUS keep an eye out on/for Ferry traffic.
Currents - not that bad especially the deeper you go into the cove
Winds - Depending on the time of day, strength thru the slot, direction, etc...there can be some downdrafts......easy to see once you get in there but again no that bad.
I've come to appreciate the place more & more ......