A longer highway trip once a week will make sure you burn off all the moisture that's in the oil, so that way your engine will have less chance of internal corrosion. This will also allow your oil to last for a longer drain interval.
Since I noticed yesterday that my mom has only driven 600 miles since December 22nd, I told her she should make one highway trip a week of at least 20min (or more if she can) In the extreme cold up here it can take at least 20min of highway driving for my car to reach full oil temperature (although in Texas your LT1 would obviously warm up much quicker)