Fischer meats in Issaquah has done thee animals for me and have done a really good job. They'll do ground, jerky, summer sausage, pepperoni sticks, and regular sausage. The only thing I haven't done is summer sausage, never been a fan.
My friend had an elk butchered by a guy who works at Owen's in Cle Elum, can't think of his name but you could call and ask if they could roccomend anyone, that's how my friend got in contact with him. He mixed in bacon fat in the ground he did for my friend, excellent! Has just the slightest hit of smoke to it!
Good luck!