Looks like a great time. I often use the USGS sites to get an idea of water levels. Check out http://waterdata.usgs.gov/usa/nwis/uv?site_no=04060993
The Brule was below the 20th percentile for this time of year, you guys were really draggin it. I think when I did it in May of 1996 there was lotsa water as a lot of those rock ledges you were working over were great class II runs.
Rivers can be so different depending on water levels and the season. So often people ask me if I get tired of the Manistee running it 4-6 times a year or more for the last 18 years. My response is that to the observant, it is never the same! Thanks for sharing. Might have to join you next year.