Can you play wolfquest multiplayer for free

Yes, you can. All you have to do is register here.
http://www.wolfquest.org/bb/ucp.php?mode=register&sid=689879e02e6667b0d41e4b3de968c39e

Some things to keep in mind when playing multiplayer:

Be kind and considerate. All of your chats should be proper and appropirate. Do not bypass the chat lexicon filter

Mates on WolfQuest: Multiplayer are not allowed.
If you see any mate-related/gender-specific chats, please send in an abuse report.

You can fill out the abuse forum here:
http://www.wolfquest.org/abuse/index.php