I see many Southern Tier riders in the coolers months on US Highway 90 the highway has a wide shoulder all the way from Van Horn to Hondo. Van Horn to Del Rio towns few a far between but close enough to resupply. I’m sure you guys know all this stuff already. Del Rio to San Antonio the traffic will pick up the closer you get to SA. I’ve semi toured, Katy Trail MO, GAP/C@O but never cross The whole country.