I stayed at the Pop Century last year and you can definitely see Zombieland from the resort. I am naturally curious and like to walk, so I also took the Bridge to Nowhere, which is also a little disturbing. It dead ends, leaving confused people looking around and then wandering away.
Some people followed me, I suppose because I was walking purposefully, and when we got to the end they looked at me with an expression of mild confusion and betrayal.
I stayed in the 50s, which are closest to the Zombie Suites. I could have probably made it past the fences, but I already had built up a rapport with the security guy who was camped out at that side of the parking lot (he gave me some walking shortcuts and we also had an unexpected conversation about American citizenship), so I didn't push my luck.
I did push my luck at River Country, and all I'll say is that you can get right up to where the slides were, from more than one direction. You might not want to, though, because what I saw almost made me literally cry. Unless you're really into rust, splinters, and weeds.
And as long as we're on the subject,
this is where Japanese zombies take their children on vacation.
Otherwise the Pop Century was much nicer than I expected it to be. I liked it a lot more than the All Stars.
The walk around the lake has little signposts with historical footnotes on them that were pretty interesting (although I noticed a few typos).
I'll be disappointed if they use that area for something other than the other 5 decades. It'd be awfully short-sighted of them to use them for anything else.
That said, I think I would really enjoy camping out in the ruins, playing apocalypse. At least for a couple nights. They should offer discount rates for the resort. You'd pay extra to sleep near the metal barrel with the burning garbage on cold nights.