rear bearing problems

ok guys my bad luck streek doesn't seam to be stoping.well today one of the rear bearing let go on me. (making all kinds of grinding noises) i was wondering what kind of a job it is to change it. the reason is cause i would like to do it my self to save a coupple bucks. do i just unbolt the plate that holds the axle and pull the axle out or is there more to it. and btw it is a 86.
thanks