I use wetbags for a variety of purposes. One smaller for nightime changes one for the overnight dipes for my toddlers and one big one for the laundry room... So offering a variety is key. I used to make wetbags as well and too found them more difficult to photograph. I think the key is neat looking fabric (no wrinkles) and nice light (natural outdoors). Good luck!
Mom to two DS (2 and 4) and wonderful DH. Not a SAHM
...unfortunately. CDing for over a year and love every minute of it!