I'm currently in the area with my Dual Nature alt, and would recommend that for now you stick to Shuttlebank as a search and sleep place, as it has quite some resource buildings close to the St. Simon area and relatively little danger.
A few buildings in the west are ruined and provide safe entry points for Freerunning, as do the churches usually.
(And in case anyone's wondering, yes: I'm the zed that freeruns through the night, I'm the not-so-smart revive that comes back to literally bite your feeding hand, I'm the one plank that refuses to fit into your barrier, I'm... Totenmannskiste.
For this time, I'm on the other side of the law though, as the zergers ruined the fun of an exciting - and most importantly fine and fair - siege, and as I refuse to collaborate with blatant cheaters.)