The good thing about the bolt on tail is that you can easily replace it if it gets damaged. I've had a couple planes that used this type set-up. They have been just fine with the exception of my GP Cherokee which had the tail come off in flight. Not sure if the Cherokee problem was due to the soft wood used which allowed everything to work loose or if I did something dumb during assembly. Either way, GP took care of it and sent me a new airplane.

I always make sure to use thread locker and periodically check the bolts. I also seal the areas where everything comes together with clear RTV silicone to prevent any fuel or oil from creeping in.

If you feel more comfortable using epoxy though, go for it. It definitely won't hurt anything. If you decide not to use it it will likely be just fine too.