I find most rivers have “the stretch”. The popular section used by liveries but when you start consulting the guidebooks you can lengthen things up- camping becomes the bigger issue, Is your expectation to carry the gear with you in the boat and camp riverside? ozarks might fit that bill nicely. Even the whitewater river in Indiana can be turned into an extended trip. Are you looking for current, mild ww, open water, variety? I’m not really sure what “wive acceptable is” , is that a base camp with showers? Camping with electric? That’s what my own wive prefers but I don’t doubt many wives would find my adventurous spirit a bit tame for them. These days I seem to prefer a base camp; restraunts with good pie are always a plus, after a tiring day of paddling. A pub located at the put in or take out is extra nice. I think I could easily paddle multiple days on sugar creek, the blue, or green but that’s me. Are you looking for something a bit wilder? That comes at a price, Usually involves some dirt roads, fluctuating water levels, portaging, lining, and at least some basic ww skills.