I might be slow, but you know what .. my boat sips fuel.
I take a 10L and 25L tank to the gas station @ my cottage (20min drive one way). Bring the tanks back to the boat in the morning, fill up the boat and it's good for the weekend and possibly into a second weekend. That is all based on how far and how long we are in the boat. Some weekends we just go out and anchor and swim and relax and drive back to the cottage.
I know I have posted this comment on here a while ago, but I think I figured my gas spending over the season to be around $200-$250 range. Probably closer to $250. I know I did not touch $300 for the season.
Oh the other thing is, I have never filled up my boat @ a marina before.. heh. I do it off the back of the boat, just like im filling up the lawnmower.
Z202, another saying " you gotta pay ... to play". Spending time on the water, nothing else like it.

You should add that last line into your signature... haha thats funny man.