What special salt is he talking about?
The special salt he's talking about is probably "sól warzonka" which is a sea salt.
Should I have used sugar?
Some recipes call for sugar so the answer is Yes if it calls for it.
Does anyone have any recipes for Polish sausage?
He can look through the recipes on this site and find what he likes.
Spices type of wood and how to smoke it ,you will also find that information on this site.