I do them outside with the hose. Last year I made the mistake of letting the leash get wrapped around my finger and Addie started freaking a bit and pulled back. 
It actually got pulled off my finger (she was about 140# then), taking the nail with it. I thought it was the ripping off of the nail that hurt so bad. I finished her bath and still had to do Emmett. It is still swollen some and I guess it always will be, I can't bend it 100%, and it still will swell up more and hurt like hell some days. Nothing was broken, just torn and stretched. That finger is gonna be all bent up and gnarly when I am old!! 
That's the other reason they get one bath a year, I don't do them in the tub. I am not fighting with Addie for starters, or have Briona fur up the drain, and the bathroom is upstairs so that is tough for Emmett who would probably be the only one who would do it. I did give Briona and Emmett a bath in the tub once. I remember I had to pick up and put 1/2 of Emmett in the tub, then pick up and put in the other 1/2. He wasn't fighting me, he just wasn't going to help either.
I really do not find myself thinking they need a bath more than once a year anyways. Last year it had been 2 years between baths. If for some reason I thought they needed one in the winter I would take them to a groomer where they could do them.
OUCH!! Something to remember them by forever, I guess.
I ended up taking Harley to the groomer in his later years for baths during the winter...I only bathed him about once every two months. But he hated getting into the tub, and it was just too scary when he got older. His hind legs would slip around in the tub, and he would take every opportunity to try to get out.
I was really nervous about hurting him trying to keep him in the tub. SO I found a groomer with drains in the floors so they didn't have to lift him into anything.
