Bikes are dirty greasey things. If part of your touring involves bringing it into the passager area of public transportation make sure you have a bag to put it in, or wrap it in a painters tarp secured with bungee cords. As a practical matter the conductor is much less likely to eject you from the train if your bike is wrapped.

Plan ahead, think about the consequences of your actions, use common sense and make sure you have enough cash and insurance to solve any problems you get into.