The only gas I have is in a tank under the van for a bbq point... thanks for the advice.It really isn’t worth the gamble, book it as a campervan. They can get really upset if they catch a campervan pretending to be a car, it isn’t so much the description but the onboard gas bottles they get upset about. If they are in doubt you get directed to a special lane on the left after control where you get inspected.
We have a few times been sent in this lane even though booked as a camper - they just want to check the gas bottles are turned off.