No one has mentioned the rule in/when connecting jumper cables. Connect the PLUS first at the batt post... then the NEG to a distance bare heavy metal place on the engine... i.e. if there is a spark it will be remote from the explosive gases of the batt. On disconnect.. do unconnect this distance NEG cable forst in case there is a spark as the curcit is broken.
Good advice. On my 2004 Chevy pickup there is a spot in a little plastic box to hook up the positive cable. The negative ground spot is on the alternator bracket, clearly marked. Both are away from the battery.
We just plug our camper in to the house via an extension cord a couple of days before we leave. Charges the battery, and gets the fridge cold! Once again, redneck camping - and we have never had a problem with it yet!