Don’t pass flexible power leads through windows or doors.
Try to avoid using double adaptors. Get a qualified electrician to install more power points instead.
Two jockey wheel clamps welded to the caravan A-frame (one on either side) allows flexibility in attaching the jockey wheel when on sloping sites.
Keep a tube of grease remover handy for the inevitable dirty hands associated with recreational vehicles.
Lubricating the shaft of a hand-operated water pump with a few drops of glycerine (available from chemist shops) will help it work more smoothly.