I think you may be on to something. I never hunted that area. I do believe that in the panhandle region, mulies are moving eastward. I heard a mulie was killed just west of Wichita falls a few years back. I've seen pics on THF of mulies that seem to be expanding their range. Hard to do I'm sure, with the more prolific and aggressive WT also expanding their range.
Life is too short, as is. Don't chance it.
Don't text and drive.