at level 27 you really have no reason to help out with the effort... it will be months of playing before the gates' opening will affect your wow experience.
if i were you, this is what i would do...
get up to level 30 and start killing those raptors in arathi. collect all the flesh but DO NOT TURN IT IN!!!!
you will run across level 60's in the area farming the same raptors to open the gates... these guys have been running the same dungeons for weeks or months and are the ones who the gates are going to help.
sell your raptor flesh to these 60's for 1.5G or more per stack. trust me they have the money. true you could turn in and get your scroll and green item but you will do much better with the cash and the auction house at level 30.
this is from a guy who turned in over 450 signets for ironforge rep at level 35 or so...