I'm a new wood burner playing 'catch up'. I've burned most of the prime dead standing trees and need to start on some standing red oak. Is there an advantage to girdle the trees before the sap starts running in a couple weeks? I can't cut and split all that I want that fast without making a mess, but by making a cut about the chain saw depth around the tree it should stop the sap, and eliminate leaf growth. Even better to do it to 'next year's' right? Anyone have experience with this?