Answer as many as you want. 
First, a background; I've played classical guitar for about 20 years now. I have a bachelors degree in music and I also teach music (Guitar). My left hand technique is quite good and I am comfortable around any instrument with strings. I bought a banjo about a month ago and downloaded Patrick Costello's free book. Great book for beginners! However, I blazed through that in about a week, so I went on here to find recommendations for a more challenging book. I ended up picking up "Clawhammer Style Banjo" by Ken Perlman. He recommends to go through the book at a pace that is too slow for me, but some of the songs are quite challenging. I am currently on chapter 10, page 96 and am going to continue through all of his books since his explanations and attention to details are pretty awesome. I practice like 4 hours a day.
I am running into some snags that have me a little disappointed in just using the book. Guy Wolff's youtube channel was probably the biggest inspiration for me to pick up a banjo. I want to play in that style, but I feel that Ken Perlman's book focuses too much on precise technique. I know I am getting better, but I want to be able to sit down and "jam out" some songs without worrying about the rote memorization needed to play Ken Perlman's arrangements. How do I do that? What resources do you recommend? I prefer to work with materials that are on paper. I don't do much playing by ear until I have something vaguely memorized.
On to the banjo questions!
I picked up a Deering Goodtime 2 with a resonator for a steal. I took the resonator off, added a renaissance head and it sounds awesome! Should I put classical strings on it? I really like the sound of nylon strings on a banjo. Is the neck too thin for them? Do I need a 5th string nut? I have no idea how to install a nut on the 5th string. Can a no-knot tail piece accomodate both metal and nylon strings?
Thank you guys so much for your help!
-waz