Hi Steve, I think you're on the good way. 16 ft canoe is a very good size that can bring some gear and two peoples.
The book is definitly an investment, give feedback when you get it.
Unless you have skill in canoe sailing, my advice would be you have your latten sail reefed before you go sailing, if you don't have reef points already made, you should make it, it's easy...just wait Todd's book.
Usually, 45 sf is enough, but some experimented sailor use 65 sf sail.
As I said before, I use 2 outriggers, so my canoe becomes a trimaran and highly stable even in F5 wind condition, having one reef at main sail. Outriggers were homemade. I have a clip on Youtube describing how I did. See it there:
http://fr.youtube.com/watch?v=LdKoXdL_PKk
Maybe Ed would bring some help here.