Just take some music along to the concert, a book, whatnot... its HIGH RISK of a fight opening up being stuck in a car with her for 4 hours ... be VERY CAERFUL you have something to avoid conversation building up...

That's goign to be a very dangerous drive as far as your relationship goes... be very careful there.

Yup, keep calling OMW and checking up on them... just be reassuring, tell them you hope everything is going well for them etc... send some flowers to them as a couple.

Your telling others to hold off on the advice is a good choice, I am afraid though that the bad influences may not have anything good to offset them.