Depends on your definition of 'work'. You would have to dance around a lot in order to get wet. Keep in mind that domestic electric showers are over 8.5 Kw, and one of those would blow any ehu.
Try and get a caravan water heating system from a breaker, but beware, some are gas only, some electric and some both. Installing a gas one would mean extra vents etc as well as cabling and pipework. Not a small job.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.