In regards to "local" events in my area:
1) There has been some loss, due to the fact that local organizers, over the years, have gotten older and younger organizers (from the town sponsoring the event) don't want to "step up" and keep events going.
2) There have been new local events (in other towns) that have taken the place of events that have faded away.
3) Reenactor numbers have not diminished.
4) I started reenacting 12 years ago, doing between 8 and 10 events per year.....Twelve years later, we still do the same amount.
5) In the last 5 years, our unit has nearly doubled in numbers of reenactors.
I do not speak for other regions of the country, but in my experience and locality, reenacting is strong!