Don't forget a caravan jack (or two), an extra rechargeable drill and a full set of bits, spare gas regulators, at least 3 torches, spare bulbs for caravans long-gone and fuses the same, 1.5" adjustable spanner and full metric and AF socket set, all sizes of screwdrivers and screws), duck tape, insulation tape, gas soldering iron and solder, every tent peg that you own (metal of course) totalling at least 100, vacuum cleaner, hand brush and dustpan, clothes airers (at least two) and pegs. Oh, before I forget, extra guy rope (sufficient at least to go twice round the planet).
The list goes on and on - no wonder we need a twin wheeler.
When I have had a problem on holiday, there's always been a caravan accessories shop to hand. Other than that I'm the same as most other people, spare wheel & jack, water pump, and duct tape. Anything else is just dead weight and can wait until the morning.
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.