There is an internationally recognised system called ICE (In Case of Emergency)
Put the names and mobile phone numbers of the people you would wish to have contacted in an emergency under the headings ICE 1, ICE 2 and so on in your mobile phone. If it is ever necessary then they can be contacted on your behalf by anyone knowing the system –eg paramedics, police.

A List Of Essentials

First Aid Kit
2 warning triangles
Reflective jackets for all travellers onboard
Torches & spare batteries
Smoke detector
Carbon Monoxide alarm
Fire Extinguisher & fire blanket
Spare bulbs & fuses
Spirit level
Levelling ramps or lengths of wood
Gas bottles
Gas bottle spanner
Water hose
Tap adapter
Hose connectors
Toilet fluid
Plastic or rubber gloves
Tool kit
Electric hook up lead (s)
16 amp to continental adapter
Polarity tester
Polarity changeover lead
TV aerial extension cable.

Check list before moving off

Inside
All doors, windows , roof vents and lockers closed and locked
All loose items secured ( NB check bathroom )
Fridge switched to 12v and locked
Tables locked in position
TV aerial or satellite dish in travelling position
Maps, directions etc needed to hand in cab
Money for tolls handy
Dog, cat, children secured ?
Anti-rattle precautions wedged in place
Plugs in sinks

Outside
External lockers and inlets closed and locked
Steadies wound up
EHU cable put away
TV aerial cable put away
Step and mats put away
All items below van removed (chairs, buckets etc)
Gas turned off
Levelling ramps or skid mats stored
Awning rolled in and secure
Bikes secure and covers, warning plates etc in place

Make sure before leaving the site you have:

Fresh water topped up if necessary
Dumped waste water and checked cassette
Filled up drinking water
Collected all cards from Reception and made your final payment.

Important things to remember for each person:

Passport
Driving licence (including paper part if new-style licence)
EHIC medical insurance card*
Health and travel insurance policy and contact details*
Credit cards (tell your bank before you go)
Debit /cash cards (ditto re bank)
Spectacle prescription
Regular medicines prescription (or the tear off list that comes with a UK prescription)

Ferry tickets*
Campsite booking details, if made (and directions !)
Address book with UK contacts listed
Camping Card International card (CCI)
ACSI card*
Caravan Club card
Camping and Caravanning Club card
National Trust Card
English Heritage Card
Top up details for mobile phones ( tell your provider you will be going abroad- ie roaming)

ENJOY YOUR TRIP!!