Quoting E.P. Mom:" Oh that sounds wonderful!! I plan to soak in my tub in some warm water for as long as possible before I go into the hospital. "
I think laboring as long as you can at home is a great idea. I think it would be more relaxing and that's the key to getting baby in the right position to come out. relaxation and just taking ques from your body.
I'm hoping I give birth in the tub, but they say that since FTMs usually labor longer, their babies don't normally don't come out in the tub. So I have to fight the urge as long as I can. Lucky me they have a shower in the room as well, though, so I can just jump in there when I have the urge to get in the tub.