I'll chime in and agree with the previous posters.
You never know what you're going to get in October or November.
Sometimes it's hot as heck, and sometimes it's cold as heck.
Definitely bring the heater!
A electric small space heater is all you need for a pop-up camper that time of year. The good news is that if it does get real cold, the cold seldom hangs around for long that time of year.
TCD