Longest I have done , canoeing , was three weeks , car camping out west usually 30 days since I get side tracked a lot.
River trips , up when the coffee is done , on the water around 10 , paddle a short time , take a sand bar break , paddle some more , another break and pull off around 2 or 3 at the latest. CAN'T Paddle after 4 , no matter what since that is coctail hour and camp has to be set up by then and firewood collected. We do have rules .... you know.
Find a nice spot , lay over a day or so ( group decides on that decision) and then repeat the above process.
Most of the paddling is at river speed or a shade faster to maintain control , but we do drift a lot for the guys that want to fish. We are not out there to run a marathon , just to have fun and have to be no place at no given time.
Heck we can take a week to paddle a two day river like the Ocklawaha , it is really easy to do. Especially if you have located a good supply of firewood.
Okefenokee and Everglades , different story , you have to at a certain place ( campsite , unless you reserved it for 2 or 3 days) at a certain time or date due to the scheduling of the National Park service. Those are normally a 10 to 12 mile day paddle.
Chuck.