Youre tempting the hands of fate here by doing this and I will NOT tell you what to do here but so many have tried this with Parents out of town and some were lucky nothing happened while others weren't. You have to ask yourself about what if something goes wrong and I end up being a teenage Mom or worse. You will learn that not all plans go as they should and also what about nosy neighbors ? Just one thing, when in doubt at all, don't do it so err on the side of caution but personally it doesn't sound like you or both of you are quite ready for a weekend like this especially if you have to ask the world via the Internet what to do. Good luck