If it is on a surface the dog is not used to then try and find a spare ring and practice. My puppy thought he was in doggy heaven when we took him to an equestrian centre, he was really focused on trying to find the nice smell

We are having another outing to an agricultural venue soon, I view it all as practice, hopefully he will get used to it!!!
Think about whether you are going to feed him before travelling, we never do as he gets an upset tum so he is always keen and looking for treats. We feed slightly later the night before.
Make it fun, you take the best dog home and remember your pup is a baby, you can't expect them to know what to do and always get it right.
The next day you may find they sleep more than normal.
Having said all this I will admit to only ever handling twice, it's not my thing, hubby much better at it, my nerves travelled down the lead and I came out of the ring and was sick

Enjoy!!