Good luck, Mike.
Tough position to be in, I know, I was in a similar
IT management position back in the 90s with men
over twice my age as my subordinates. Humility
and respect on your part will go a long way toward
making things smooth.
But don't be intimidated by their age, either. Respect
it, and stand firm in your position as supervisor, but
don't lord it over them. You probably don't know as
much as them, and don't be afraid to lean on/learn from
their expertise.
Again, a tough spot to be in, but one that will make
you wiser and teach you a lot about yourself. Just
be ready to learn