Epsom salts and water to the rescue again! In my mind the reason the baths help us has to do with the pressure the swelling causes. The warm water pushing against the body I think helps our lymph system to drain away some of the fluids.
I know about the getting in/out of tub problems if you can swing it and what I'd like to get is a walk-in type tub. I think that would help the most since the deeper water at the feet would increase the water pressure.
If you can get a chair near your tub you could always just put your feet in for a soak.
Good Luck and best wishes