If you use the Jr. then your main option would probably just be to ninja people when they show up. The ranged weapons, they can sit on those two perches near the top pier and keep people out. But if you're a Jr. player, then I guess you have to patrol the hallways and the entrance to the anteroom area?
The Saltspray pier is a nightmare to approach if the whole section is painted and they have a couple people patrolling the entrance. Even if you take back the middle section, they'll just back up to the top of the ramp and re-group.