Ok, so I've been down this road before.
Hi Katie - I think that's a great question for your doctor and that it's also important that you make him/her aware of your birth history. I also wonder - are you close to the hospital or quite a ways away? My understanding from conversations with my doc is that the risk of rupture from just going into labor is actually still very small -- even with a history of high order C sections.
Good luck to you!!!