Love your mixed up hexies! Even though they aren't in the typical flower arrangement, I would connect them in squares or larger hexie units. I am working on a hexie quilt also and sit in front of the tv to join the units. There is some satisfying in fitting them together. By joining a smaller unit onto a large unit, it seems to make it easier with most of the quilt in front of me. I would think a long row would get difficult to handle. But either way, it turns out great.