Mooseeyes,
Edge water in Ione is probably your best bet. There is a hotel Valley Veiw I think its called on top of the hill outside Metaline Falls that you can pitch a tent at. The resorts along the river were closed when I was up there in July, dont think they were opening. Mt Linton Rv Park may be open not sure though.
Edge Water has showers also, It will be a bit of a drive if you are heading to the far north roads but not to bad. Hope this might help some.