If it only gets down to 30ish, you should be fine! Can I assume you have heated, insulated basement/tank area? If so, you will certainly be OK.....if the forced air runs at all at night. In Wyoming higher country....not uncommon to see below freezing temperatures in September. Early October camping in a pop-up in single digits is memorable! Down here in the low country, I’m tired of seeing the upper 90’s with a 100 or two thrown in......ready to see some snow and cooler temperatures! Enjoy your time boondocking! I know that we’ looking forward to a few weeks boondocking in November/early December! memtb