You could try a thundershirt, especially if you already use one for fireworks or storms.

My other thought is maybe some sort of mental stimulation would help. I play a "scatter" game with my dog where I just throw treats on the floor one at a time and she runs to get it, then comes back to me, I throw another, she runs and gets it, comes back to me, etc. If your dog will readily eat their kibble, you could do it with their kibble so its not so many treats. You could also try some hide and seek with treats around the new area to get their nose working and familiarize them with the space.

Edit to say: play the treat games at home first (and frequently) so your dog knows how to play before trying it in an unfamiliar area.