It can be a little nerve racking to pillar and bed a rifle the first time but fully do-able yourself. The primary points are:
- you want the action and barrel to be in the same state of stress that they will be when in the field. That means letting them sit naturally (while bedding) with gravity acting on the barrel as it would in use. For this reason, I don't believe in using a band of tape around the barrel to "center" everything.
- Just enough stock (1/16" or less) needs to be relieved so that a piece of paper can be freely passed between the action and the stock prior to bedding.
- Use modeling clay in any areas that you don't want filled with epoxy. Also, use modeling clay to fill any part of the action that may act as a mechanical bond. I use neutral shoe polish as a release agent. It's a good idea to remove the trigger.
- Pillars are useful if you are going to be torqueing your action screws a lot. Personally, I get a rifle shooting well, set it and forget it. So I only rarely have used pillars.
- It's easier to clean up all the epoxy that oozed out before it dries rather than after (wiping it off is easier than going at it with a dremel and files).
There are a lot of tutorials on the web with pictures which help. Either way, do some research so that even if you decide to take it to a gunsmith, you know what is a good job and what you want.