I'm Sleeping on the Ceiling Tonight

I have five acres on top of the mountain near Monteagle. Haven't seen copperheads (yet) but have seen several rattlesnakes. One I nearly stepped on. I have a LONG pole with a net on the end and I move the snake to another part of the property. Even the poisonous ones serve a purpose in keeping the rodent population down. That being said, I don't keep the shed doors open and ditto on the compartments in the RV. To the OP, that snake found a way in somehow, probably from the underbelly of the RV. Rats and mice like to nest in the insulation, and where there are rats and mice, you will find snakes.