Hiding isnt going to work(even if you can, it wont be for long enough). Most guns are a bad idea(too loud, attracts other zombies).
Ill take a quote almost directly out of the book,
.22 rifle, a bike, and a shovel.
You dont need to haul ass out of town, just move faster than them. Slow and steady pace wont tire you out as fast, the .22 ammo is really light and cheap for carrying/stocking purposes, the shovel is good for decapping a zombie at a decent length, ad well as batting them away. Find a group of ppl, go someplace inhospitable by unprotected humans (way up north) or get on a large ship/boat and sail out into the ocean and dont drop anchor. Doneskie. Wait till they decompose.
Or for smaller scale, engage in close range with the rifle only when you need to, preferring distance of course.
I personally think that the way it was portrayed in WWZ was really well done. Ppl will want to get out of the infected zone, even if their infected, and when presented with the opportunity to make money, ppl will let/help them. I think that if done correctly, a class 4 outbreak isnt totally out of the question. That and the obvious resistance ppl are going to have to killing family/loved ones. Fire to me is out of the question. Napalm is not worth it. The fire isnt going to slow them down, all your doing is making the zombie more dangerous to approach until the fire consumes the body, which id imagine takes a while.