Before I get down to business with a mallet and my chisels this is what I used on Abraham and Isaac: Shopbot CNC, Titebond II glue, my trusty Porter Cable drill and Irwin, Miro-Moose Hand Screw and Rockler pipe clamps.
The CNC is helpful in removing a lot of wood quickly with minimal involvement on my part. Would Michelangelo use such a device or is it cheating? I will write a blog post on that soon.
The glue is a water resistant wood glue that works great. These will never reside outside but better safe than sorry.
Three types of clamps with three purposes. The Irwin clamps are great for positioning the pieces being glued. The wood will slide a lot when initial clamp pressure is applied. The Irwin clamps are easy to use one handed and easy to adjust as needed. The pipe clamps work great for applying a ton of pressure on the glue joint. The hand screw clamps can apply a great deal of pressure too but they really shine in having a deep throat and being able to clamp at odd angles.