We were in Estes Park from 9-7 to 10-7. Camped at about 8K so got a little chilly on occasion but we go every year at that time so we know what to expect. We also usually go to Branson for a couple of weeks in November and have hit some teens temperatures on occasion. Dealing with the stiff stock cord is pretty low down on the list of my mods but I've done most of the important ones, at least to me, already.
I do carry a 15 foot 50 amp extension cord.
2020 F350 Platinum, srw, lbcc, 4X4, 6.7 diesel, 12,400 GVWR
2020 Pinnacle 32RLTS