Might be a good time to test your propane detector if your trailer has one. If you have the little coleman propane tanks you can poke the little shrader valve. Its just like letting air out of a tire.
Propane sinks so think about that as youre walking around smelling. Squirt bottle with soapy water would be my approach. Even if it turns out the mixture is off its not a bad idea to squirt soapy water. Some items it helps to shake them gently. My propane regulator hose will leak if if i pull the hose in a certain direction.