Our truck only gets used for towing the trailer in the summer and plowing snow in the winter. Occasionally we will drive it when we have one of the daily drivers in for service or loan a car to family. We just change the oils when it needs it and keep the gas tank full while stored. It has gone six weeks and 3 weekend trips without even being unhooked from the trailer. We unhook the umbilical cord and put the tongue jack down to take a little pressure off the equalizer hitch and truck springs, but don't know if that is really required. This has worked for us with no issues.
