If you play old time frailing style I assume that you play with down strokes all the time and therefore you don't need fingerpicks unless you reverse one to use on your index or middle finger (whichever you use)to protect it from wear and tear.
My own view on using picks is that the experince is somewhat like taking a bath with your socks on.
As for books, Art Rosenbaum's Art of the Five String Banjo is pretty good.

Hoot