I plan to tackle this for the first time and have done my research on this site with all the great info! Still a couple questions after reading the shop manual -

1 - Why do they say, if necessary replace the wheel pin (I take it they mean wheel lug nut studs) - why would this be need to be done?
2 - Are the tool drivers for snap rings & shims necessary? None of the forum procedures I've found mention this.
3 - Are the shims necessary?
4 - At 130K miles, should I just get new bearings instead of reusing the old? I take it they are cheap?

Thanks - any other hints welcome!