You don’t need to take an entire 144-piece mechanic’s tool set with you. A simple set with an assortment of standard and metric sockets is adequate. Anything else should be on a Jeep-by-Jeep basis. However, always take at least one screwdriver with interchangeable flat and Phillips tips and at least one good pair of channel lock pliers such as these Knipex (red handles). We used to take bailing wire and duct tape, but recently zip-ties have replaced the bailing wire.