I've had our RV for several years, but this is new to me: I got the camper out from under its winter tarp and started it up--as I've been doing every couple of weeks--and noticed a fairly serious fluid leak, perhaps from the gas tank, perhaps from the rear differential. Hard to tell which. I moved the camper so I could put something down on the driveway to try to absorb whatever leaked--it had that rainbow coloring of spilled gas--and in fairly short order the leak stopped. I've never had this happen before. We had a pretty mild winter, if that's any kind of clue. Not sure what to do next.