The private servers are nothing like the official. Theres no point in playing a server with 100+ players as you won't meet anyone. The world is immensely huge!
The official servers have well over 1000+ players and full scale wars are held against the other factions town. Also, try running a hunt into Ironforge's instance, Molten Core with only 20 levels 60s. =) Your not going to get anywhere. You need around 40 level 60s with good formation and role, using healers etc.
So don't be cheap, go buy the game.
By the way, Guild Wars sucks. Why do you think the creators were kicked off the Blizzard Team? =P