I read the whole of irnbru post plus the gov.uk website and if we class ourselves as a club then I would read it that we could meet in a group no larger than 30 in a venue , be it a field or hall but would need to practice SD. If you socialiased in one another’s Motorhomes though you would need to choose your bubble perhaps to reduce your risk. If it was a hall you’d have to provide hand sanitizers , toilets, cleaning but not in a field.
A club I belong to is restarting in a hall on the 10th and there’s about 15 of us.
I was so slow I’ve just seen what Jim’s written so it may be changed.
But only if you haven’t already formed a bubble with, for example, other members of your family.
One cannot chose to have a bubble associated with your home and then form another bubble when away in your motorhome.
Ian