There are many other clubs that can issue exception certificates.. Jim , our dear leader has that power.. but I don't know how many Fun CLs there are.. (I think only one or two)
See also the Schedule 1 (ScotJimland link):
Use by a person travelling with a caravan for one or two nights E+W+S
2Subject to the provisions of paragraph 13 of this Schedule, a site licence shall not be required for the use of land as a caravan site by a person travelling with a caravan who brings the caravan on to the land for a period which includes not more than two nights—E+W+S
(a)if during that period no other caravan is stationed for the purposes of human habitation on that land or any adjoining land in the same occupation, and
(b)if, in the period of twelve months ending with the day on which the caravan is brought on to the land, the number of days on which a caravan was stationed anywhere on that land or the said adjoining land for the purposes of human habitation did not exceed twenty-eight.