Maybe I'm just doing it wrong but I can't reliably change campfire carts' direction. When right clicking them after they've stopped moving or after they've begun moving in another direction it seems impossible to change their direction again unless they come up against a block or ramp.

Right gotcha. It would be nice if we could right click either half of the cart to 'push' it toward the side we clicked it on. Specifically I'm trying to use these to power train contraptions from the Create mod.

That's working as intended. I didn't want bumps to change it's direction. Try making a turn-around loop with rail turns.

The code is based off of how Furnace Minecarts work, and I believe it depends on the angle you right click it from. It should start moving in the direction you are facing when right-clicked- is that correct?

I just gave it another play - Furnace Minecarts allow direction changes after a few clicks which seems to be a bit random. But with Campfire Carts I couldn't switch the direction with the same methods, since right clicking seems to only toggle it on and off. Sometimes even when giving the cart a nudge in the opposite direction and turning it on again it tries to travel in its original direction.