I'm about as non-interventive as you can get. I've declined all routine testing, I'm not even allowing doppler/ultasound use, etc. I would normally NEVER consider prenatal VEs, much less a membrane strip at 38wks.
That being said, I can completely relate to the stress and pressure you must be feeling right now. My biggest fear is having another c/s. I know within myself that if I ended up with another one, it would truly be necessary and that the safety of my baby would be the most important thing. That knowledge (and willingness to do what is necessary) does not stop me from being mind-numbingly afraid of the possibility. If I was being faced with that very real option and was in your shoes (and if I'm being completely honest) I would probably consent. I don't think anyone who has not been through that really knows what it's like.
That being said, I don't think it's a decision you need to make right now. I would take it one thing at a time. Maybe you can make the decision hinge on something...e.g. "If I have any bloodwork come back with elevated enzymes, it's time to do XYZ" or something like that.
I like to focus on doing "the next best thing". Ideally I would have no interventions whatsoever. At the same time, there are ideals aren't possible to meet and you have to start thinking about what that next best thing is. I personally think that a membrane stripping is probably LESS risky than black/blue cohosh or even castor oil...for me, that would be something to try before I went to the other kinds of non-medical induction methods.
I hope, hope, hope that your BP and bloodwork remain somewhat stable and that none of this will be necessary. I hope also that you can find some peace of mind no matter what happens.