I have searched this talk forum using the search option on "Propane", and have not seen/read anything about whither or not you/I need to carry/display and HAZMAT 2 Labels/forums when traveling???? Could not find any info on this question on Internet, I even went to ask.com and could not find an answer. What Official documentations are needed with RV, that has a propane tank attached, when traveling ??? And when traveling, does the RV suppose to pull-in when truck weigh stations are open to get weighed?