I just bought the same boat, haha, 2003 Maristar VRS210, and just put a Pro-Flight tower on it 3 weeks ago
I was just up at Almanor the week before the 4th of July...super nice. Even though its a fairly 'open' lake without good channels/coves, it got relatively calm in the evening. Even during the day I was able to find some patches in the North-East corner of the lake that were calm. Seemed to be choppiest at the sound end.
Where else do you ride? Almanor is super far for me (San Jose/Bay Area). Also, did you see a big difference when you dropped in the fat sacs? I'm thinking of buying some, but don't want to waste money if it wont make a sizable difference. I can push it up pretty high and out into the flats without any extra ballast.