Here jepster in Colorado uses a Rapid Laundry Washer (a kind of plunger style laundry agitator) and a commercial salad spinner to wash his laundry and then hangs it out to dry.
Here is a closer look at the salad spinner he uses:
Here we learn how to make a camp-style bucket washer (which uses a plunger to wash). I’ve noticed on other videos that you can also make holes in the plunger to allow for more water flow and agitation:
LDSprepper shows us a different style of agitator, used with galvanized tubs.