How to Brew - By John Palmer - Priming Solutions
I'm not sure if you've ever used a nomograph, but they're pretty easy to use. Just line up your serving temperature with the number of volumes of CO2 that you're looking for (for that particular style), and bring that line out to the right. Where ever it intersects is how much corn sugar you'll need to use.
I think a lot of people (myself included) use the bottling bucket for three reasons:
1) I don't ferment in a bucket with a spigot
2) I can rack the beer off of the yeast cake before bottling
3) If you put the priming sugar in the bottling bucket before you transfer your beer there, you don't have to stir in the sugar (it mixes itself)
I'm one of those people who gets all of my info on the internet, but I still went out and bought Palmer's book (How to Brew). He's got some of the stuff on the web for free though (the link that I gave you).How to Brew - By John Palmer - Priming and Bottling
There's his whole chapter on bottling.