Tenntom
I went upstream on the Tenntom 3 months ago on a 41 ft powerboat. We had radar, but chose not to travel at night. In many places, the canal is very narrow and a marker could be in the middle. We had about one knot of current, but that could change depending on rainfall. All locks have floating bollards. You need a minium of 2 people, 3 would be better. You will need 2 large fenders, that you will probably destroy. We ran a line from the bow and one from the stern around the bollard and back. Don't tie them off because is a bollard jams, your line will become very tight quickly. Station a person on the bow and stern to fend off the wall and keep the lines adjusted. A pair of old gloves will help. You will need to have your registration or documention number handy for the lock master. You will need to have enough fuel to go 200 miles at a time. We fould plenty of fuel stops except between Hefflin Lock and Mobile, which had none. The cruising guide stated a fuel stop at Lady's Landing, but has been closed down. Contact lock master on VHF 16 and they will take you to another channel. You must wear a life jacket while in the lock chamber. Just north of Hefflin Lock is a large marina. The river side is for large tug boats, the inside is for small craft. I can't remember the name of the place, but there is a great restaurant there and you will be ready for one.