Well if your going into something like a solid piece of wood then drilling a small hole towards the bottom of the hole the hinge is going into allows the epoxy a place to come out of when the hinge is pushed in. You can also just put the epoxy on the hinge so you don't get too much of it in the hole. For repairs I use a heat gun to remove the epoxy/hinges. Works well unless your trying to save the covering. In that case they make the hinges with a screw and they can be taken apart and assembled again.
Now that I'm living in a city again I no longer have bar oil on hand. The gardeners here don't even have chain saws, you have to phone a tree service if you need some trimming.
I have never tried JB Weld but I have seen it mentioned in a few posts. I used to use it a lot for making throttle linkage on cars using cable and hime joints, heating it will thin it so it flows into holes and cracks. Heating it will not soften it again once it is set though. I use it for mufflers and have even used it to repair cracks on engines.