I've lived more than half my life within half an hour's driving distance from US Highway 90, both in Texas and Louisiana, though never near the parts of Texas where bluebonnets grow. I especially relate to the lyrics about a wife who stays home while her husband goes away to find work. I've lived through separations like that. Those were hard times. The separations would have been unbearable had we not believed we were sacrificing time together in the name of building a better future.
The song reminds me of what might have been--and what was for a period of years. I never counted on getting used to the months apart. On enjoying the peacefulness of them. On acquiring a taste for solitude. I guess that would be a whole 'nother song.