If I was intent on not disassembling my hubs, I would remove the entire trailing arm, upright, and axel assembly as a unit and get it up on the bench. Still an awkward and unwieldly thing to deal with. However, having got things apart that far, unless the bearings were recently done, I would dig in and replace them. By the time it's all on the bench, most of the hard work is done, and you could find you need bearings a few months after putting it all back together.
The wheel bearing arrangement on these cars is marginal, and waiting for signs of wear or play before replacing them could result in damage to a very difficult to find bearing housing/upright or axel. Given the very narrow reserve factor designed into these cars, it's best to replace such items at time/mileage intervals, or as opportunity presents itself, as opposed to when they begin to exhibit wear. Just something to think about.
