There's only 10 sites on Angel Island, so we got a permit by going during the week (24 hour trip out the front door and back) Tuesday-Wednesday. We also took the ferry from Tiburon so factor in cost of parking and ferry boat ride into the campground.

Definitely stay on the Eastern side for less wind but bring plenty of stakes in case. Small island hikable in one evening/ morning so not sure we'll return. Views are great, don't get me wrong, but I prefer hiking over looking.