The Reserve Support Unit at Camp Upshur helps more than just reservists but active duty and civilians as well, all-year round. In 2012, the RSU coordinated different types of training for nearly 200 units. - The Reserve Support Unit at Camp Upshur helps more than just reservists but active duty and civilians as well, all-year round. In 2012, the RSU coordinated different types of training for nearly 200 units.