For most RV enthusiasts, there is always a lingering sense of unease when spending the night in an unfamiliar location. Whether parked in a national park campground or at a remote roadside overlook, the moment darkness falls and you retreat inside, your ears naturally perk up at every outside sound. Is that a branch scraping against the side of the vehicle? Or is something moving near the hood? At times like this, do you pull back the curtain to check, or do you try to ignore it? Many experienced RV owners would choose to check their...