Re: Would you survive?
Yeah, a bike can't mow through hordes of Zombies like a car can, but that's not the point when you're trying to GTFO. What you want to do is move quickly and silently. Zombies react on base instincts. They'll be attracted to all the noise you'll make in a car.
Not to mention that you'll have to make calculations NOW as to how much gas you'll need, depending on the vehicle's MPG and how long you'll have to travel, taking into account that the ways you WILL be able to take WILL NOT be straight lines, especially because - like I said - the roads will be blocked off/dead stopped - no pun intended

For a short hop - maybe 2-300 miles - I can see using a car. Much further than that, you WILL want a bike. As I said before, it's silent, therefore less likely to attract the zombie hoards. What you don't seem to register is the threat the zombie poses. It's pretty much just a dead human, yes, and yes it does only walk/shamble, but you MUST destroy the brain to truly kill it, and it's blood is contagious, so splattering it all over the place ISN'T the brightest idea.
If you MUST use a vehicle, find a helicopter. It suffers from requiring gas, but it more than makes up for that in it's mobility. It can take off/land most anywhere there's a clear patch, Zombies CANNOT fly - did I mention they're only driven by base instinct, so they therefore cannot perform complex actions that we view as simple such as riding a bike, driving, or even pulling the trigger of a gun? - and it covers distances quickly. Not to mention it's a good mobile post for sniping zombies once you've got a base set up and can actually start hunting them.
I'm not saying the pistol should be over-looked, as it CAN come in handy, but you have to be trained mentally to be able to be that close to a zombie and not freak out so much that you shake too much to be accurate. Range is your friend - ESPECIALLY mentally - when fighting zombies.
I'd much rather swap the pistol for a titanium crowbar and either a short sword or a Katana, because the range they'll be at for a pistol to be accurate - well, unless you're trained well with it, then I can see them being further away - I'll be using my shotgun, and any closer I'd switch to melee.
I know the real thing will freak me out, and I pray that I don't have any melee encounters until I've got a base established. But, that said, I've trained myself for this for the past year now, and I'll continue training into my old age, even if the time never comes. I will not be caught unprepared mentally and physically, dammit! :O