I don't think we could be further apart if we tried.
I think we should be cautiously stockpiling at least a few bits - just in case. DH firmly thinks this is insanity and a waste of money/ time / space. He doesn't believe there will be shortages of anything and any price increases will be so marginal it's not worth bothering...particularly on the kinds of stuff you can stockpile any way, like canned goods.
I think we should err on the side of caution with our usual European Easter hol and maybe consider UK at Easter, Europe at Summer. Especially we we travel with our dog. DH thinks there is no chance in hell there will be any transport disruption to the ferries let alone airports because he says it's economically inconceivable that there would be.
And so on and so forth.
I've pretty much given up even trying to persuade him because how do you move a mountain? He could well be right. I very much hope he is. But if he's not, surely it's better to be able to say I Told You So and the worst you have to deal with is a holiday in Devon plus a stash of tinned tomatoes to wade through. As opposed to if he's wrong and no preparations have been made at all...