you cant loot an area you just spawned in as far as ive seen, the loot and zombies dissapear in the area unless other players are there too. as for safe zones, lkie camps people make with several tents and vehicles. well, if you hide them, they wont be found. i hop servers, not in quick succession but when a friend comes online, or if we are trying to get into servers together etc. but also, when i havent played in daytime for several days and i just want to be in daylight so i switch into a euro server. now, if they made several servers, for each time zone, and had more accurate dasy/night cycles (like how its night at 8 or 9 pm even though its bright until 10 or 11). then it would be alright, to have a server, where you enter it for the first time, and it becomes the server your character solely exists on. ensuring you a spot on that server only. however, as things are where there are connection issues with some servers, or player limits on servers, then a master server persistence is required.