Well you will be needing air tools and lots of time because i cannot tell you approximately how much its going to take you because it can be more than you expect for the simple thing that can make the procedure harder.
You will need a lot of heavy duty pullers and such, but the job is pretty straight forward. The 2002 has a solid front axle and diff, so if you are just doing the outer hubs the u-joints should be inspected for excessive wear, but replacement is based on this inspection results.