As long as its on display you should just get waved through, I've never seen one get examined before. They just want you in the correct side, and everyone is really happy on your arrival with big waves and smiles.
LOVE the drive into the CV fields
You will be fine, might be an idea to have a photo of their ticket in case they crack down next year. I have never had to show anything other than my campervan pass.
Now that we have got the east CV pass, I have another potential blocker as the person who booked the pass will not be travelling down with me on the Tuesday but will be arriving on the Thursday.
Will I potentially face some pushback getting on as the name on the pass will be different to my admission ticket?