Mary will officially update the OHCRA calendar soon, but, I'm Planning to reserve 2 or 3 adjoining sites at Hartwick Pines State Park from June 2 thru June 13. We will be there the full time.
We'll offer to coordinate day trips on the AuSable and Manistee rivers any/all days for whoever comes up during that stretch. There is easy 5-7 different/nice day paddles within a 1/2-1 hr or so of camp.
Tentatively, the second weekend we'll plan a 3 day/2 nite downriver for those interested. Both of these rivers have long stretches with spaced out rustic (hand pump, pits) campsite on the river. Many have 2-track access if you want to prestage. Both rivers have very 'do-able' overnight canoeing/camping.
Again, Mary will post more info on the OHCRA site.
Hope this helps. Eric