buying a set of 1/2" and 3/4" conduit benders has been a boon personally, EMT is cheap if you dont fuck around with a bunch of couplers and prebends.
I make all sorts of stuff with it, from lil green houses over the garden boxes to a nice fence hanger for my bug zapper, attached to a switch box so I can easily shut it off and spray it down with garden hose.
nice benifit of conduit runs like this is all the cameras are properly grounded, much less likely to be damaged by near strikes with all the cabling in a faraday cage.. i take it you strapped them to some copper at some point.