I'm a new RV Camper and just wondering what is legal or I should say Illegal to carry across state lines or have in my trailer at any time. Such things as RX prescriptions, open alcohol spirits, firearms, marijuana, opiates for medicine, ammunition, and such. If my trailer is my second home I should be able to carry any and all of the above, right? I should add gasoline and diesel fuel, kerosene too. When looking at the other side of this question I find that we living here in the USA are really blessed too. We can travel extensively for 1000's of miles without being inspected at the border and can easily venture into two other countries with few questions and little impediment. BTW when crossing into Canada, do they and can they search your Ollie? I don't think I want to venture into Mexico, do you?