badgercanoe,

If you paddle to Murdock from Lund, you'll want to fish below each whitewater drop between Knox & Murdock.

End of May, eh?  Might be best to check w/the park office a week or so in advance re: the status of "ice-out" in 2011.  

Marten isn't kidding about those portages.  One of them is really nasty (but might actually be better IF the ground hasn't thawed out too much).  Nevertheless, paddling those BIG lakes with BIG winds and BIG cold waves would certainly get me thinking about his Green Airways recommendation at THAT time of year.

Good luck!

Jimbo   8-)