I use quickpic and gallery. All i can tell you is the following
With the stock gallery, you have to make individual folders and place them on the sd card itself not in any other folders like the DCIM folder. The phone by nature saves all pics and vids taken to the DCIM/100media folder. If you dont want a folder to be seen by gallery or any pic app, just rename it with a . (period) in front of the name.
Now with quickpic, you can put the folders on the sd card or in the dcim folder and name each folder what you like. I had them on the sd card for a while then moved all my folders inside the dcim folder and all works well. Also with quickpic, you can long press any folder you dont want viewable and select exclude and that folder wont show up in quickpic...
if you have done this and it doesnt work for you, I would not know why...