Hi Jeff, welcome to iPadForums!
You can delete the photos from a complete day at once, and if you select all of them, they'll all be removed at once.
Here's how:
In the Photos app, go to the Photos tab. Make sure you see the day view, then tap "Select" at the upper right:
Now tap "Select" next to every day. It will change to "Deselect", and all of the images of that day will be checkmarked:
Make sure you select every day, then tap the trash icon to remove them.
In Albums view, go to the Recently Deleted album and remove them from there as well, or else they'll still be on your iPad.
Hope that helps.