on the rum river & have paddled from lake Onamia to Princeton, MN many times.. There's a couple of good water campsites. The one just before county Rd 4 landing south of Milaca is a great site. There's another one north of Milaca just south of the rest stop landing (haven't camped there though) Beware of the dam at Milaca. It's not huge, but you can get in trouble. Easy portage. Haven't run all the way to the Mis cause it's suburban after princeton. The run from lake Onamia to the rest stop landing is about 15 river miles & is a fun run with few houses-mostly goes through state forest land. Or you can run it to the county rd 4 landing-another 6 miles or so. Lots of class I in normal flows, class II at higher levels.
If you're interested in running a stretch this spring, & doing some camping let me know & I'll give you my email, phone # & me & my paddling buddy will make a run with you if you want some company. Water is crystal clear. Here's a link. Just click on "view map" it shows landings & campsites. http://www.dnr.state.mn.us/watertrails/rumriver/index.html