Hello - We went to Zion several yrs ago & stayed at the Zion River Resort. It was very nice (altho when we stayed the pool was closed) We were given a space backing up to the river & we were the smallest trailer in the park
, but all was quiet, peaceful & clean. If you want to see a few pics of Zion (& even one of our space at the resort) you can go to my pics. We spent time at the sand dunes down there also. Rented an ATV in St. George, Utah & spent the day at the dunes. Was much fun, our 2 boys loved it! We were there during Spring Break, so cant say much about weather in winter. I'm pretty sure it can snow there, but from the latest weather report here in Colorado, I havent heard of anything bad on the way before Thanksgiving. I have my sister & brother in law headed this way starting tomorrow from CA. going thru St. George in small car & they didnt hear any bad weather reports either. Hope you have a great time!!!