Late March is the perfect time to visit the Texas Hill Country. Inks Lake SP puts you in the triangle with amazing towns to visit. Burnet, Llano (Cooper's BBQ), Marble Falls (Blue Bonnet Cafe and Bear Brewery), and Fredericksburg. So much to do in Fredericksburg (Brewery, German food, Military museum, including George H.W. Bush exhibit.
Lady Bird Johnson and LBJ historic sites around Johnson City, TX.
Best of all of this is you will be in the heart of Blue Bonnet season. Follow the Blue Bonnet Trail, and the Willow City Loop. The drives are beautiful and the Blue Bonnets and Indian Paintbrush are the frosting on the cake.
Inks Lake - North Loop, right on the lake, site #88. Though at this late date, the North Loop is probably full.