With the new iUSBCamp app v1.2: https://itunes.apple.com/us/app/iusbcam/id675508754?mt=8
1.) Tap the Setting button (gear wheel icon) and switch to the right to turn on the Auto Download .
2.) Select "Auto" in the Save to Album, then the photos from camera will be auto saved into camera roll in iPad/iPhone.
3.) If "Manual" is selected in the Save to Album, the "Download" icon will be displayed on the image, user has to tap the icon manually to download to iPad/iPhone.