This reply is quite late since I just recently rejoined this group. Having been up to Leech every year for 30 years, I know a lot about the area. We used to have a year long trailer on "little Leech" - in fact, I believe it is still there. We went there every summer from 1960 until the 90's.
Leech Lake is named due to the leeches in the lake. Yes, that is true - played with them as a little girl and a lot of locals use them for bait.
Best place in the world for Walleye and Northern. Even caught myself a muskie or two. Love it up there, but summer is short!
We used to stay at Agency Bay Lodge