You are correct about Part 101, my mistake. As far as an "open assembly" I'm not sure what the interpretation there would be, but our field is grass on edge of a farmer's field and up against a line of trees. It is *very* hard to spot from the air and even though its out in the middle of nowhere, we have low-level aircraft that occasionally go by - at, or near 400-500'. When we fly jets there, we have spotters...

From what I've heard, BLOS will not be allowed for sUAS under Part107...

Bob