I stayed at home until the contractions were 3 minutes apart, presuming i would be in established labour by then
hadn;t banked on OP baby. and when i got to hospital i was not dilated !!! anyhoo, was encouraged to get off the bed, stop using gas and air, and move and rock with teh contractions, which i did, for one hour, and she turned.... after that it was all systems go!
the longer you are at home, relaxed, mobile, upright, able to listen to and work with your body, the more chance of less intervention and a succesful VBAC
i would doubt you would even be admitted to labour ward, if you are not in active labour, so you might well end up on ante natal, with your partner and doula possibly being sent away . and no pain relief !!
if you do not wish to have CFM, and you are making an informed decision, then stay at home.. if the doula suspects things are not going well... and there will be signs of it, if so, then she will either encourage you to go to hospital or get a MW out to check you over