When it’s muddy I put a towel down by the door. I rinse her feet with water and then walking over the towel dries them and grabs the last of the mud! A paw cleaning tub wouldn’t work for her giant feet. I have a washing up bowl reserved just for that.
I've got one of those door mats which are supposed to clean off mud and it's useless with my mucky labrador. I've got an e-mop which is brilliant to mop up muddy paw prints. It's permanently in the kitchen. I lay a towel down by the kitchen door, the dog stands on it and if he's feeling cooperative, let's me wipe his paws. If not (and generally regardless), I follow him about with the e-mop and mop up the muddy paw prints. Not much help - sorry!