Behind the tank station with the ice staff is by far my favorite. It allows you to be available to revive the person at three easily. The map is huge and it hard to be available to revive all three players if they are spread out across that map. If you would like to forgo the staves or complete the easter egg; you could run the crazy place and have a huge amount of space and access to all for corners of the map.
Panic will always be your down fall. Round 30, your instinct would tell you run directly for jugg after respawn. You buy the perk and turn around to a wall of your undead buddies. If you take off running you will run directly into zombie spawns, so give it a few seconds group them up and then rebuild your arsenal. I recommend picking up the shield first.
I can confirm that there is a mark 2. I have gotten it three times in the many many many times that I have played. It's extremely frustrating, but I assure you that it is there.
The maxis drone, and the reverse side of the upgraded staves.
The AK is available by generator three, but it doesn't have as many wall buys available.
If you spend 30k in points, you get a double tap from the reward boxs(located by Gen 1 and Gen 6).