The process of dunking the wood in the resin and pulling a vacuum on the whole thing should work; under vacuum the air and volatiles would bubble out, and when the vacumm was relieved resin would be pulled in. The trouble is in the resins we use, which cure at room temperature. I bet the stuff the industry uses can be left to soak for as long as needed and then cured on demand, with heat, electron beams, or microvaves.

One nasty characteristic of our room temperature curing epoxys is that they give off heat as they cure. If you mix a batch and leave it in a jar, the heat generated causes the cure to accelerate, which generates more heat, etc, etc. I wasted a quart in five minutes this way once, and burned my fingers to boot.

Another bother with doing this at home is the need to prove to yourself that it has actually worked. This would involve weighing treated samples and soaking them (boiling, maybe?) for long periods, drying and re-weighing to see how fast water is picked up. To get an acceptable value for this you'd likely have to do the same with proffesionally trated samples.