Actually, it shipwrecked off Vanderbilt Reef just north of Juneau, Alaska.

Besides this message board, there is also an extensive thread here http://boards.ancestry.com/mbexec?htx=message&r=rw&p... about the Princess Sophia shipwreck. There's a brief history of the shipwreck, with photos & maps, at http://www.ssislander.co.uk/sophia.html

Some posts have mentioned a couple of books about the shipwreck (search at the big online bookstores). I found one of them with a helpful annotation at <http://genforum.genealogy.com/ak/messages/958.html>;:

"The Sinking of the Princess Sophia: Taking The North Down With Her; copyrighted 1991 by Ken Coates and Bill Morrison, University of Alaska Press, ISBN 0-912006-50-1. On October 23, 1918 the steamer Princess Sophia left Skagway, Alaska bound for Seattle. On broad the Sophia where residents of almost every community in Alaska and the Yukon--miners, businessmen, civil servants, their wives and children--heading south for the winter. That night the ship grounded on Vanderbilt reef north of Juneau. Two days latter it slipped into the sea taking all 353 souls abroad with it. This book contains a corrected passenger list and limited biographical information about passengers and crew."

(I don't know about "every community" -- Alaska then & now has a lot of communities who were probably not represented on the ship.)

Other posts have mentioned resources such as the Vancouver (BC) Maritime Museum <http://www.vancouvermaritimemuseum.com/>; & the Yukon Archives in Dawson City, YT (though I thought the Yukon Archives were in Whitehorse, so perhaps they mean the Dawson City Museum) as sources for info about the wreck & passwengers on the ship.

There is a list of 66 Princess Sophia passengers who were buried at the Mountain View Cemetery in Vancouver, BC at http://www.city.vancouver.bc.ca/commsvcs/nonmarketoperations... (there is no one listed here with the surname GARNER). That page also has a list of the ship's crew & a brief history of the disaster.

There's a Sue Barr who is supposed to have a copy of the complete passenger list; see http://archiver.rootsweb.com/th/read/CAN-BRITISH-COLUMBIA/20...
That's info from 2001; don't know if the email address listed here is current. She was still posting on Rootsweb from that email address as late as October 2002.

But hopefully other people who read this thread might also have a copy of the passenger list. Would be good if someone who did could post it online!

Good luck.

-- Mel