I recommend you not send them to the campaign office - they will just trash them. Send them to one of the Alaska Governor's offices -- that way they get "counted" and are part of public record. Here are some offices (more at: http://gov.state.ak.us/govoffices):
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Governor Sarah Palin
Alaska State Capitol Building
Third Floor
P.O. Box 110001
Juneau, AK 99811-0001
Governor Sarah Palin
550 West 7th Avenue, Suite 1700
Anchorage, AK 99501
Governor Sarah Palin
675 7th Avenue, Suite H5
Fairbanks, AK 99701-4596