You should be able to get plenty done today. There won’t be any distractions that can possibly turn you away from what you’re supposed to be doing.
Travelling together is a good way to build on your foundation as a couple. It’s also a good way to get used to each other’s quirks.
Your naiveté might be a big disadvantage with a deal that your company is trying to make. If you can find a way not to be in that meeting, do so.
Nothing lasts forever, but it’s important that while you’re here, you make the best impression and live the best possible life you can.