I'm not sure by what your interpretation of a clinking sound would be, but you stated that it happened in very dry climate. I'm assuming it stopped when humidity got higher. It quite possibly is your subfloor shrunk when in the dry area then swelled back up when humidity rose up. A lot of higher end trailer floors are bolted through the frame (not screwed to frame) at points you can tighten to correct a floor that seems loose and can make a clinking or clunking, sometime a squeaking noise around floor cabinets. But be aware if you tighten to much it can do the opposite in humid weather. Your thread states you have a 2015 Mobile Suites, if this is correct it may still be covered under warranty. I would call them and ask them about this. If your just out of warranty period ask them about a good will gesture to find and fix it for you. I would call them anyway so you have it on file with them, if it happens again. I hope I didn't confuse you more. The sound needs to be heard from a technician that knows how to work on floors, or someone from the factory. If it is still making the noise now, video tape it so they can hear it. Sometimes it won't happen when you bring it in to be checked. Sorry for long post. In end, since it such a new rig I would call Mobile Suites.
Retired Professional Firefighter
2007 Nuwa Hitchhiker DA329RSB