What's the biggest boat that has been up to the 92mm? ( I think that is the end 92mm)

I think some 33-38's went up there with a group from MWBP in May.

I know for sure this year there was a 370 SS and a 38 PQ.

What MM does it start getting sketchy?

I'd start being careful around the 70MM, just keep and eye on the lake level and what time of the year it is, I'm sure you know the Lake fluctuates.

is Possum Holler still up there by MM 74 I think ??

That is the farthest I have gone and that was 10 yrs ago.

Yup, still there.

What's Possum Holler?

Little hillbilly waterfront bar/restaurant, but pretty cool though.

It's at the 61mm