Our site was fairly level for our class C, we just had to use one or two leveling blocks. We did a video review of the campground as well. https://youtu.be/LxiQLrpTtNg

I agree with the 2 answers from today. I have a 20' van and was able to move a little back and forth on the pull thru to be level without blocks.

Most of the pull thru sites are pretty level

Sites vary greatly from somewhat level to not so level. A block or two on your pickup rig would get you level on most sites.