As far as pulling the wheel and drum as an assembly, i've done it that way lots of times, front or rear or trailer, as long as i'm not changing the drum. Drives or trailers, i use a dolly if on concrete, or if outside in the dirt use a greased wide plank. Also works with steers. With the weight just off the bearings they slide right off after the seal breaks loose. Same on the steers. It just takes more care because they don't balance on their own like a dual assy. There's no actual heavy lifting. You have to be careful reassembling so as to not damage the seal. This procedure saves having to re-torque wheels and is easy to check bearing adjustment on older trucks in my opinion, and it can save time in the long run as long as the brakes can be backed off enough. On old trucks and trailers with spoked hubs it also saves time by not having to break the wheels and spacer bands loose during removal and to true the wheels during installation assuming they were true to begin with. Just my opinion.