Rack bags options I've attached a rack to my bike, this one: ![rack]( Now my question is: what are my options for bags or something I can attach to it? I'm not asking about a product rec, just for a list of options with pros and cons for each. The rack was bought primary to mount a child seat on it, so if there are options to carry both a seat and a bag it would be great.

Without a specific recommendation from the manufacturer about a way to have both bags and a child seat, I would not recommend it. Most of universal rack panniers have some sorts of straps going over rack's rails which would interfere with the child seat.

Consider another option: move the load forward, i.e. install a front rack to carry bags. This way the bike would be even more balanced when carrying the weight.