With a card reader, you can move all the photos from your digital camera to computer. After that, you can take advantage of iTunes to transfer photos to your iPad. This should be easy, but please note that the RAW files takes much more storage space than the JPEG files, so you'd better take a look at your storage space of your iPad before you import photos from camera to iPad.
After importing photos from camera to iPad, you can view them with the Photos app on your iPad. The RAW files can also be read on your tablet, and supported RAW files are exactly the same as your Mac computer does.