We camp with a 60# lab greyhound mix. Always wants to be where the action is but was well mannered. Our second dog is a 30# beagle border collie and has issues with separation as well as others dogs walking by.
We crate inside the trailer, leave the radio on and/or fan if electric hookup, take 'em for a good walk before and give 'em a chew bone or Kong with peanut butter inside.
Our camping neighbors always say the only time they heard 'em is when we got back to the site. If we leave the CG, and made friends with the neighbors, we have in he past given them our contact number. This last part may be extremely trusting but we have done it.