"Mike Levine (former LEO) has a talk show in NYC... I used to laugh when he said that he was tasked with infiltrating some of these "white supremacist groups"...and he'd go to a "meeting" and by and large there were much more undercover LEO officers there than actual white supremacist nutters. Sometimes by a factor of 3 to 1."
The county militia where I lived included almost all of the local law enforcement. They weren't hiding at all. Of course this was in rural Tennessee.