Hi! I live in Idaho, it is very dry here (less then 20% humidity usually) and gets pretty cold in the winter. I recently purchased a large orchidarium and I have had no problems keeping the humidity around 75% and mine is not fully sealed as well. If you plan on keeping your orchids in the orchidarium when you arrive to your new home then you should be fine. But as far as the trip there, well I have never had to move orchids before so I am not much help, sorry! Happy moving!

Should be no problem with an orchidarium. The question is moving the plants. Beware of plants left in a un-airconditioned car or van. A friend of mine re-located his collection from N. Carolina to Orlando in a large van by driving all night. (Would have been too expensive to ship plants, or rent an air-conditioned truck.)

Hey, Adam, good luck with the change of venue. Salt Lake City is quite beautiful. I have moved with as many as one hundred plants in my crazier days. It isn't the heat, it's the light. In the back of a moving truck they will be fine for several days, I wouldn't even try watering any but the thirstier ones. In any vehicle with windows through which sun can shine you must block them up consistent with commonsense and road safety or put a layer of newspaper over the plants. BTW your description of the last large growing case you made sounds excellent for elvinwei's uses. You might want to describe it again in his/her thread assuming you don't have enough to do getting things road ready.

H