Oh - there are lots of options! If you are wearing your LO on your front, I find a backpack works really well. If you want something smaller, I'd suggest a hip or 'fanny' pack that clips around your waist. When I wear DS on my back these days, I usually just sling my purse over my shoulder the way I normally would, and it's fine, or if I have more to carry, I wear a 'messenger' style bag that I put over my head and then it sits on the opposite shouled and across my chest. at the back, the strap sort of sits in front of DS, between me and him. Make sense?
Lindsay, mama to Owen (06.08) and Sadie (05.11) partner to the amazing J.