The only way I see this working is to get the camera kit first. Then put all your pictures on the sd card to your camera from your computer. Remove card from computer and connect it to iPad with the kit and open Photos. When you see the pictures on your card, choose the one to be the last in your viewing order, tap on it to select then immediately save it. Then answer "keep picture" to the prompt. Return in and choose next to last picture and save it etc,etc,etc. It will be long to do it this way but it will work.
All those pictures will end up in the only pile that's modifiable. It's the only way to keep order that I know of in Photos. They will be placed by order of download.