[flyinguy68]

Thanks for the ideas. It does stand to reason that there would be additional smoke alarms near other sleeping areas like the ceiling loft, and garage, but to the best of my memory I have not seen them. The bummer is that I didn't have my battery installed to allow for a search at the time and it's a 4 hour round trip between home & camper. The chirp will likely have died by the time I can get back again.

Thanks again folks.