Sounds a reasonable idea, so long as you can make all the pick ups (and returns) in UK at an acceptable cost.
LM is another matter, since that will involve delivery to all the campsites on dates and times (and at exact locations) required by your customers. No good arranging a central pick-up point, since by definition your customers have no means of transporting the stuff in their own vehicles.
That leads to the ACO, who are not at all keen on granting concessions for vans or trucks to have access. A few years ago I tried to start up an ice delivery service round the campsites. I was told to approach the marketing department of the ACO, who told me in no uncertain terms to piss off as there was no call for the service. Now I speak French and told them that I thought it was up to me to measure the risk, and up to them to tell me how much the concession would cost. No joy, just "it's people like you who make our lives difficult" I told the old bat involved that no, it was people like me who were paying her salary and that she'd be better off working as a tax collector so that she could be rude to all and sundry with impunity. End of conversation.
Best of luck.