If you can afford concrete that is the way to go. Gravel, a grade with fines up to 2b angular, will work very well. Prep for gravel is nearly the same as concrete. Remove the sod. Compact soil. Add geotextile ground support. Add gravel. Compact. Also with both, take a look and evaluate if drainage should be added.
2019 Hemisphere 272RL
2007 Silverado 2500HD 6L