MudderChuck is correct. Unless you are unable to drag, cart, or otherwise transport the hog from the site where it lay to your vehicle, there is no need to quarter the hog at the area where it is harvested. Do a You Tube search for field dressing. If you feel the need, stop at nearest store and buy a couple bags of ice and place inside cavity before travelling home. At home, wash the cavity and remove excess fat, bloodied meat, etc. missed while in the field. Be careful to avoid cutting the tenderloins while field dressing and while trimming at home.

I recommend having a processor chosen or find a friend knowledgeable about butchering beforehand. I don't recommend you attempt butchering alone without prior experience.