Bearings are going bad... Someone help?

So, I am having this terrible squeaking that occurs after the truck has been sitting for a while and goes away shortly after I drive a little bit. Since I know my brakes already make awful noises (which needs to get fixed) and it's not them and the only other things that move are bearings up front, I am fearing that they are going out. My truck has 95k on the ODO. Does anyone have any links on where I can go for a DIY or something similar? Also, what do I need to buy to replace them and how much is it going to cost me? I am newb when it comes to bearings anyway so any help is greatly appreciated.