There are mainly three camps and they come with the associated vehicle.
The recruited Mobs, when trained, will be assigned to the Mob Camp. Mob Camp by default will have a capacity of 10, which can be improved with future upgrades. Even if Mobs are assigned to other buildings they will still occupy their space at the Mob Camp.
* Merc Camp
Similar to the Mob Camp, Mercenaries will be accommodated at the Merc Camp. It too has a space restriction and it can be improved with upgrades.
Logan, Babe and the Bosses we obtain from the Boss Fights will be accommodated at the Boss Camp. Unlike the Merc and Mob Camp Boss camps doesn't have a space restriction even though Bosses need higher space requirements.