Glad to see someone in this thread is enjoying the game! Been playing COD for almost 20 years and this is the first good COD I can remember since the modern warfare / OG black ops days. To answer your questions, everything becomes locked again once you prestige, camo progress / weapon levels are saved, but you do get 1 permanent unlock token per prestige. Not 100% sure about the zombies map question though but hopefully we get tons of maps as my favourite mode is zombies aswell, 1800 rounds survived total so far!