By all means do what you are comfortable with. Increased temperatures do decrease charging time and in theory overcharging could be a concern with “dumb” chargers. I was able to find studies noting a decrease in battery life with increased temperatures. Here is the best study I could find on the subject of heat and battery life and it does support your supposition of the negative correlation between heat and battery life.
I’m still not willing to take my batteries in and out of our camper. Those darn things are heavy and I am getting old! 🙂 But again, go for it if you feel the need. 🙂
Steve and Andra
2012 F350 6.2 gasser SRW LB
Fab Fours front and rear in case we run into a rhino
2019 Northstar Laredo SC