Thanks for this post and pics. Spent all my summers during the 50's, 60's into the mid 70's boating and skiing on Arrowhead. Proud member of the original "Lakeside Trailer park Crew"
In the mid-60s bought a place way back up in the north bay, but after one summer sold it and returned to "The Park", it was just flat out more fun.
Certainly recognize the island in the background of a couple of these pics, and yes I also recall seeing that beautiful Patterson. First flatty ride was in the original "Tiny Tim", I was hooked but couldn't convince dad, he kept muttering something about his "Bad Back". So I just kept up my seasonal sanding practice on our various mahogany Chris Crafts. Lost all our numerous boxes of vintage Arrowhead pics and 8mm reels in the 07' San Diego wildfire, what a shame, I'd give anything to have those back.
What I can't seem to recall from the 60's are the Hydro Hoists, but then there's a few things I don't remember so good from the 60's ---- WHOOO HOOOO !!!!