Log into your Photobucket account
Select UPLOAD button, and navigate to where your pics are stored on your PC/TABLET
You can select multiple photos to load in one go
Once the pics are showing in your Photobucket account, thet will have 4 separate links beneath each picture
Copy the IMG code for the picture that you want to post
Paste this into your DIS post
Have a great time!!
EDIT!!!
Sorry didn't read your post fully !!!
I assume your pics are already in your photo library on your iPad?
Install Photobucket app on iPad
Log into your Photbucket account
Select upward pointing arrow (Choose upload source)
Select Photo Library
Select all of the photos that you want to load
Once pics are in photo bucket - select any pic and at top of screen click the icon that looks like a chain
Copy IMG CODE
Paste this into your DIS post
Phew!!!

