For the front window you want a Rock Guard
, I found this company by searching for Travel Trailer Rock Guard.
I would make sure your propane detector is working correctly (buy a new one if not sure) and for sure buy a carbon monoxide detector. Then make sure the propane powered appliances work correctly (there are several guides on the internet, here's one
, but if you are at all unsure get an RV repair or LP store tech to look at them).