I can get to the riverboat and do all the necessary dialogue and buy a ticket. However, after the Lone Wanderer has "rested" on the cot, I can only look around. I can't use my Pip-Boy or use a weapon and Tobar keeps saying "welcome aboard". I don't get any cut scenes about arriving in Point Lookout. I can't find a solution to this problem. I've tried Googling but nothing has worked.

Here is my load order:
0 0 Fallout3.esm
1 1 Anchorage.esm
2 2 ThePitt.esm
3 3 BrokenSteel.esm
4 4 PointLookout.esm
5 5 Zeta.esm
6 6 Unofficial Fallout 3 Patch.esm
7 7 Warzone.esm
8 8 OfHumansAndMonsters.esp
9 9 There's No Such Thing As Bad Publicity.esp
10 a Point Lookout Travel Fix.esp
11 b GhoulEyeFix.esp

Nothing? Someone has to have a solution somewhere.

No one has a solution? Really? Nothing I have found on Google works. Someone has to have had this problem and fixed it!

What did you find? This one?
https://steamcommunity.com/app/22370/discussions/0/530646080857015377/
Or that one?
https://fallout.fandom.com/wiki/Point_Lookout_bugs#PC_only

Have you found the solution yet? I am facing the same problem atm.

The things I have tried so far:
1. Buying the ticket to the point lookout normally. After using the cot and getting stuck I can restore the controls by typing "enableplayercontrols", but there is no way to progress the quest normally afterwards.
2. Using "setstage 04005846 100" command teleports you to the point lookout, however you get stuck in the boat cabin and "enableplayercontrols" command doesn't do anything.
3. Using "coc PointLookoutStart" command after "setstage 04005846 100" will teleport you to the nearby dock, but "enableplayercontrols" won't work.
4. Using "coc DLC04Lighthouse" command after "setstage 04005846 100" will teleport you to the nearest lighthouse. "enableplayercontrols" command actually works. After you get downstairs, the controls will be taken away from you once again, but "enableplayercontrols" will still work. However, once you try to reach the boat by foot, you'll get stuck and "enableplayercontrols" will stop working.
5. Buying the ticket and using "coc PointLookoutStart" WITHOUT "setstage 04005846 100" will allow you to reach the steamboat without getting stuck. You can even travel to DC normally by using the cot, but once again you can't travel to point lookout and will get stuck if you'll try to progress the quest via console commands.

This is my load order:
[X] Fallout3.esm
[X] Anchorage.esm
[X] ThePitt.esm
[X] BrokenSteel.esm
[X] PointLookout.esm
[X] Zeta.esm
[X] Unofficial Fallout 3 Patch.esm

So, either it is a Unofficial Fallout 3 Patch problem, or I don't know what else. Starting the new game doesn't solve anything btw.

Update...

Unofficial Fallout 3 Patch is indeed the reason why this bug happens. The point lookout plays normally once you simply disable the plugin.