I did mine on the weekend
The upper wishbone and damper mount bushes are easy enough to remove, with a chisel, vice and a big hammer.
The spring pan arms aren't too bad with the above tools, an appropriately sized socket/tube and a blowlamp.
The swingarms are a bit more tricky as the casting is quite thick so heating them up enough is a bit of a problem.
It will take at the very least 30 mins per bush doing it this way, a lot longer if you've not done this kind of work before.
My advice would be to take the parts off yourself and get a garage to press all of the bushes and joints out, then reassemble yourself.
This is the order that I carried out the work >
1. Put the rear of the car on axle stands (on the subframe)
2. Remove the damper first, then the swingarm
3. Jack up the spring pan arm slightly and remove the long bolt that holds it at the hub
4. when the bolt is out lower the jack (the spring pan is now free at one end) and remove the spring and all of the bumpstop bits
5. Remove the rear nut and bolt, that attaches the spring pan arm to the subframe, the spring pan arm is now free.
6. Remove the two small nut and bolts attaching the upper wishbone to the tie-rod end.
7. Remove the two large nut and bolts attaching the upper wishbone to the subframe, the upper wish bone is now free.
8. The hub is now lose so cable tie the hub to the subframe, to stop the weight of it stressing the brakelines.
9. Press all of the joints/bushes out.
10. Clean and paint up the parts, especially the spring pan arms as these will rust through before the bushes go again, don't paint in the holes where the bushes will be going
11. Replace the bushes with the new ones
12. Reverse the procedure from 8-1, you'll be a suspension pro by this point anyway
There's no real reason to, as you haven't messed with the adjustment of the rear suspension, but get the tracking checked out, can you remember the last time it was done? its never been done since i bought my car anyway.