Silverfur will be size 2 around the time its fur is improved.
Silver mine can wait.
Fursilver has 4 food sources and 2 commerce tiles.
Every single forest in the northwest can be chopped into it outside its borders if it needs production.
I don't see how it is a trap if we wait until workboat + worker + sailing is in place before settling it.
Cow city after 3 improvements can afford to lose a worker.
At size 4 it can work the new seafood, and at size 5 it can work deer.
Capital with 4 improvements can work the forest plains at size 5 just fine.