WPA2 is alright, but WPA is crackable.
Anyways.... even with just WPA you're gonna be okay. Nobody is gonna spend the time to hack a WPA network at Jack_Schitt's house - it too much work, not enough reward.
So your cameras are wireless and auth to the net with WPA, or they are wired to the net but the same net has wireless links enabled?
Either way, like I said - nobody is gonna take the time to attempt a crack on WPA @ Jack_Schitt's house. THe only other thing you could do is do MAC filtering, but even that can be bypassed.