I had posted this as a response under the "Dry Camping" thread, but thought it may be important enough to give it some visibility....

Jim - I notice you have a 99 coach. This would be a good time to replace your CO detector if you haven't already. Most manufacturers require replacement at 3 to 5 years depending on the brand. In addition, detector technology has rapidly improved since 99.

Also, most coaches only have one detector in the back of the stateroom. We strongly recommend one forward as well. Many folks take a nap up front, particularly when camped, and others may have kids sleeping up front (like Mango Mike). Overnighting in the rest areas are problematic as well. Our ABYC standards require a CO detector where ever someone may sleep. Consider it cheap life insurance.