You say "My folks did not appear on the land bounty list however."
Militiamen were not offered Bounty land. Militia duty was an obligation of every able-bodied free white male aged roughly 16-60 (varies by time and place). Most existing rosters were created when men appeared for regular drill (not considered active duty).
Bounty land was offered to men enlisting in the Continental Army who served at least 3 years. The Levy Troops also were offered bounty.
It is essential when conversing about Revolutionary War records, to specify whether you are talking about Continentals, State Troops or a County militia regiment - a number alone does not adequately indicate what sort of unit is the subject.
The militia could be called out for defense within the County if and as needed, and might include patrolling, guarding prisoners, assisting with escorting supplies bound elsewhere, etc. In pretty rare emergency instances militia units were sent outside the County.