The books are vastly different (I'm in chapter 9 or so now, I think), but I can see the roots of the show in the book, but just barely. I like that fact, honestly.
I thought about that, but in reality, they can cruise right through the fences. The preview show them popping the guard tower with an RPG, so they're not going in with just sharp sticks, you know?
After Merle's attack, The Guv is gonna go off half cocked and guns a-blazing with a full on frontal assault. Meanwhile, Michonne is already back at the prison and let everyone know that Merle let her go and was heading out for some payback. Dayrl will make it back before the Guv starts his assault to let them know whats up. Rick and Co. will be ready. I bet they send part of the group out of the prison, wait for the assault and flank them, and take them down in a crossfire.
WHAT SAY YOU?!?!?
Thats just my guess...I could be wrong
Walking Dead rules...that is all.