I have used Hickory by itself on 3 racks or baby backs, and on the next smoke, I used white oak and hickory. (60/40 oak to hickory) IMHO, it gave it a more subtle smoke flavor. I will not hasitate to ise it again!
I happened to come across some people that had a large pecan branch fall from one of their trees. After a short introduction/explanation, I was able to load the entire branch up and haul it home!(they had already cut it into 4' sections!!) I can't wait to try it out!!
Tim