You get your usual 50 credits or so after every ten mickeys...at the end you get 500 creds and the coupon for the gold set, redeemable at the parks. I used a mule for the quest and gave the pins to my main, so I did not have to waste river ride spending money on film.
And as far as I can tell, EVERY Mickey has moved. I did not see any in the old spots. It used to be that there were 2 in almost every area, now most areas have just one, and a few of the newer areas (in Frontierland) have two. The complete list of locations is on another thread, whited out.
~Mia~