When there's rain Texas Hill Country has the best spring anywhere! The roadside is like an inverse of fall colors, you look down not up!
Don't forget there's a total solar eclipse this spring. Kerrville and Fredericksburg will be good. For most people it's not even a once in a lifetime if they don't travel.
There's about 100 wineries between Fredericksburg and Johnson City to check out.
And, MOST importantly, Kerrville is the birthplace of the greatest grocery store ever: H-E-B. Dare I mention their BBQ?