Another great place for you to level from 41 - 42 is the Harpies southwest of Red Mane Cavern. If you leveled via the Daru or Crookhorns at any time you know exactly where the harpies are. They are spread out in a pretty large area but usually over camped since they are very easy to kill. If you decide to level here and the harpies start to get too crowded you can always kill the Daru and Crookhorns just north of the camp.
I really recommend the harpies as a last ditch effort area, if you get bored of the other ones head over here. Granted the XP is good over here but, at least on my server, it is entirely way too crowded to make it worth while. Of course as time goes on and more people get out of this level bracket I'm sure this area will be less crowded. Then I'll have to change this whole final paragraph =O
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