Oh your quilt is beautiful!. First, i believe your are saying that whichever technique you use, the geese will still be in long strips like in your drawing, (for those that were considering appearance), you are just wondering about technique to do it. If it was me, this is what i'd do. I would do them in horizontal increments, and this is why. If you do one huge long strip at once, it is very easy to get it going wavy, and not precise. In smaller increments, you can square up the strips again, after each in sewn on, to keep things straighter. Also, small horizontal rows are easier to deal with. I leave all my paper on til i have sewn all my seams, just for me, i find this easier. Makes my seams much more accurate, and is very stabilizing. But it is more of a pain to tear the paper off this way after, so each person has their preferance on this. Good luck with it :)