just wanted to say good luck!!
it sounds like it wont be too far away that you go to hospital anyway, so may as well make the most of a few last hours at home.
mind you, i know its a bit nerve wracking, especially with first baby. Go in when you start to feel nervous...there is no point getting all stressed out if you feel you would be more relaxed in hospital. I only say that because I know I feel nervous being at home as i am TERRIFIED of having my baby in the car (my first labour was 3 hours and my mums second and third labours were one hour)...
but thats just me. sounds like you know what you are doing, good for you.
GOOD LUCK!!!