Are you dropping the whole beam assembly? All that’s needed to remove the rear springs and replace upper spring pads is to disconnect the lower shock mount and lower the axle on a jack, no need to disconnect the trailing arm bushings up front.
If you are planning to also pull the trailing arms for whatever reason, there’s more you can do if you choose (bushings, rear centering kit), but honestly beyond that there’s not much back there that you can’t already get at.
Doing spring pads the first time takes a while to figure out the easy way, but once you work out how to pull the lower shock bolts and lower things down it can be done in half an hour.
Edit: I assumed by “spring pads” you’re talking about the rear axle here which is a fairly simple assembly. The front subframe is an entirely different can of worms