Perfect lightweight sensible daypack - Mystery Ranch Gallagator 20L Backpack

I have tried many small (19-22L) packs for day use doing field work requiring crossing streams and short hillslope traverses with survey equipment. The Gallagator is unique in its simplicity of design--it will open full length thus limiting the usual digging through a pack since all items are easily accessed. Dual water bottle carriers are a plus. Overall comfort on the shoulders and back are appreciated especially for those of us with smaller frames.
And...the pack name, I assume is after the Gallagator Trail which is perfect for biking or walking to downtown Bozeman or Montana State University.