When I run the Middle Middle, it is often happy hour the whole way down. 

Oh, and location...  It's upstream of the concrete MM bridge about 1/4 of a mile.  If you stand on the bridge and look upstream, you can just see the tail end of the pool that's below the play spot drop.  To get there, drive across the bridge and go upstream about 1/3 mile.  I don't remember the exact distance, but you cross a smaller bridge / culvert over a stream.  About 100 yds past this smaller bridge is an old overgrown road heading sharply back to the right towards the river.  Look carefully or you'll miss it.  Park and walk this old road down towards the river, dodging puddles, downed trees, etc.  Just before hitting the beach at the river, take the obvious side option that branches off left and heads upstream.  Then, stay right to get to the rivers edge rather than getting stuck in the swamp.  Once on the river bank, walk up the shore / gravel bar to the pool and enjoy happy hour.  And, as the name suggests, bring beer. 

Last time I tried to get there it was a total swamp, has anyone been there recently?

Soon it will be at the right level, it may be a nice after work workout,,,,,,,,