My pick would be, SH 71 to 87, It's more of a straight shot, shorter with no more traffic than any other.
The 290 route through Fredericksburg is only 30 mile longer and 10 minutes more in time. It has some interstate time that makes up for the town touring areas, and this is a preferred truck route. Don't remember if that section of (I10) has a fuel stop along the way.
Dan & Loretta, US Army Retired Aero Scout Pilot
2012 Fleetwood Providence 42P Class A/DP
Spartan Chassis, 8.9L Cummins 450HP