Unfortunately diesel prices have gotten so high this weekend I broke down and bought a 4 cyl commuter car. Still keeping the truck of course but I'll use it as my weekend vehicle. It still gets cold up here at night and since I'll be going 6-7 days w/o driving my truck any advice on what to do to keep it running okay? Should I charge the batteries once a week with a trickler? Thanks for they help in advance.

Pete