OK, thanks guys! I was also thinking a 12V electric blanket or invertor with a 115V AC heating pad for colder deer hunting weather. None of the areas I go to are terribly remote (Illinois) so there would be some driving into towns, utilizing the trucks charging system and 110A alternator, though I may end up upgrading to a 140A alternator if needed. Currently, without house batteries, I am showing 13.7 to 14.0 volts on my digital volt gage depending on load. I also have a high idle tune on my F350 7.3 if I need to bring rpm’s up when not driving.