When in transit,we never unhook for an overnight stop, or do we put any jacks down. You can do the same thing at the campground too. We have on occasion arrived in the rain. I'll back in, pull out the electric cord, and go inside and wait for the rain to let-up. As long as you are relatively close to level, and you don't roll out of bed because you're on such a slope, your refrigerator will still run OK. Now your eggs might slide to one side of the pan in the morning, and your pancakes may be a little thick on one end and thin on the other, but they all taste the same anyway!
No problem. Park and go to bed! Deal with it in the morning.
Edit: If you have slides, leave them "IN". (That way you do not run the risk of any pressure or potential twisting or damage to them). That's why I'm such an advocate to ensure folks looking for a new camper to test the camper with the slides "IN". You never know what you will not be able to pull them out and need to have everything in your camper accessible.
