As you say 5 day forecasts are likely to change, so I'll hold off until Thursday.
Did anyone do the New Ulm training ride on Saturday, a bit windy (15+ mph) and rolling hills (1,900 ft of gain according to my Garmin) plus the wind blew down some of the signs so I got lost and did some additional miles...but a great ride and the New Ulm Fire Brigade grilled us burgers for lunch afterwards!
Steve Moskowitz does a great job organizing the R2R series, I don't know where he finds the time.