I actually just replaced my wheel bearings last weekend. Getting the knuckles off is pretty easy as long as the ball joints cooperate and separate easily.

I went to get the bearings pressed out and the new ones pressed back in because there is no way you can do it without a press. It cost me $70 to get it done, but it was mainly because the shop was open on Saturday and I was their last client of the day.

The wheel bearings are quite expensive at $65 a piece, but I recommend you do both sides while you are at it.