I've installed dozens of wireless bridges.  I've got one with simple Nanostations running 6 cameras without any issues.  It works fine as long as there is power.  I'm 110% against burying Ethernet cable due to the risk of damaging the switch gear on either end of the run.  I've read too much about it and with pre-terminated fiber cables being so affordable if I wasn't doing a wireless bridge I'd do fiber.

About a month ago a customer has lightning strike somewhere on his yard.  It blew his underground sprinkler controller off the wall and fried his internet router, and a wireless radio.