The Fossats
There’s a handful of guards here, two of them are distracted in the makeshift shooting range. You can sneak behind the stationary guard beside the trailer van and take him out. The other stationary guard is in the porch so you can easily take him out with a headshot from a silenced weapon. Once the body is found, it will trigger a search, including the sentry (the two guys shooting won’t join). You can wait for an ambush then get rid of the two guys. Alternatively, you can snipe them from afar, outside their territory. Once clear, you can open the door and free the victims.
The Gaudets
Head to the marked location and sneak towards the bomb shelter entrance. Wait for the other guard to get inside then take out the lone guard. Once inside, take out the other guard who just walked in. From here, you can just find cover and lob a grenade at the door to take out the guards inside instantly. You can then deal with the survivors with ease.
Rob the Coyote
Head to the shack high up in the mountain. There are no enemies nearby but before you enter, place a C4 by the gas tank outside the shack then kick the door open to loot the cash stack inside. Shortly after, two trucks carrying enemies will arrive. Wait for them to congregate in front of the shack then detonate the explosive to take them all out in an instant.