I've got guns. And ammunition. Unfortunately, nothing silenced. So, they'd be great in the initial rioting phase, but probably not the best later on when you want to avoid attracting attention.
The one that will likely wind up being the most helpful is my Beretta U22 Neos. It is a 10+1 .22lr with a 6" barrel. I have somewhere between 2500 and 3000 rounds and five mags for it. Since destroying the brain is critical, calm, aimed headshots are going to be required. I'd probably save this gun for later stages, as I have a 12ga pump, a single shot crack back, and two larger pistols (.40S&W and a 9mm). However, ammunition is significantly more expensive for those, so I don't have nearly as much.
We (my brother and I) have standing orders from my dad in the event of catastrophe (he isn't thinking zombie apocalypse, but more of Yellostone's volcano blowing) to acquire whatever weapons and ammunition are feasible and head home. Once we are there, we'll decide on a further course of action, which will more than likely include heading north. We have some outdoors experience, which will help in the long run.
Given that zombies are vulnerable to cold, we'd head far north with as much in the way of provisions and seeds as possible. Taking warm clothing would be essential, as would plenty of blankets and gloves and boots. We'd also have as much firepower as possible. Small arms for the zombies and people coming to raid what we've got, and the long guns for hunting so that we can work toward self sufficiency.
The ultimate goal would be something along the lines of a Richard Proenneke style situation. Rustic, but fairly easy to maintain once built. At least, that's the idea of it. Whether or not that would actually come to fruition, however, is another matter entirely.
