Translation of mittlerweile

They played a lot of music (very old fashioned music) and sold apples, cookies, cakes and many drinks. Having enjoyed the apple festival we went for a walk outside the village, meaning the woods.
Other tourists needed to check out first before others could check in. I wanted to see the ruins on the same day and booked a tour in this little jungle settlement and waited for the tour guide.
Your offer seems interesting to me. The language exchange is one of my future projects, so that we will contact you later when I am ready to discuss the ways and possibilities of learning together.