Merging of Charters usually doesn't workout well, really it is better for the lodge to demise and the active members find another home. If Freemasonry regains traction in their area, the lodge charter can be revived. Usually the baggage that comes with mergers isn't worth the effort of mental anguish.
Note that I said "usually", that doesn't mean all the time, but my limited experience has heard nothing but bad outcomes.
S&F,
-Bro Vick