Noticed this was your first otter. May I suggest you read page 26 of this :
http://www.nafa.ca/wp-content/upload...al_2012-02.pdf
Important info to know about skinning and handling otter. Extra care needed regarding singe.
As far as the otter carcass, make soup.
haha. Serve to inlaws.
Or put the carcass in a warm area and in a few days harvest the maggots for fishing bait.