I have used the Jumbo wheels just by inking the Wheel from the pad. I used it for the two cards below that way. The difference is you have to ink the wheel each time you start a new row whether diagonal or across. I don't know if it would work for a long row, like on a bag.
Gallery at Splitcoaststampers
Gallery at Splitcoaststampers
The second one doesn't show as well because the pad is an Opalite Inference Pad and only shows based on the light.
I think you will be fine unless you are doing lots and lots of cards, etc.
Then I would ink the cartridge.
HTH,
Shirley R.