Duration on Mullica River CANOE

The last time I paddled that trip was years ago, but I seem to remember it taking me at least 6 hours. You did mean the Mullica, not the Batsto river, right? The Mullica doesn't flow into Batsto Lake, but the takeout on 542 is within walking distance of it.
 
Mullica River

Lots of hairpins curves--sometimes the rear of your canoe is in front of you (LOL!)--be prepared to WORK on this trip---now a Kayak, well that would be a much better alternative. Have a great time!