There's nothing wrong with using loctite on the cam bolt, but you don't need it if you clean your threads with a tap and die and then torque them to spec with a torque wrench. There's a reason that they give torque specs, it's so the parts don't come apart if torqued properly, but loctite is an extra piece of mind. If you want to use loctite, chase the threads for the cam and bolt with a tap and die and torque them properly.
Do not oil the bolts before torquing, it can lead to overtightening...
