Heavy check in bags are always with me up at the counter!It has never worked with my family (2 adults 2 kids) - You can't imagine how disturbing it is to queue with young kids. Maybe they do group check ins for adults and/or bigger groups - I don't know.
In any way if 2 people are traveling (as @Seattle Shaun seem to be doing) having one of them doing the check in and the other one stay further back holding the (heavy) check in bags doesn't seem to be a good tactic.
