Importing Personal Photos and videos from your iOS device to your computer.
Copy Photos (& Videos) Between iOS Devices
How to Transfer Everything from an Old iPad to New iPad
It would be helpful to know what photos you are trying to transfer to the new iPad.
The support articles in the post above are helpful if the photos are already on your computer. If that is the case, then you can sync with iTunes in order to transfer those photos to your new iPad.
If the photos are in your camera roll on the iPad (saved photos from web sites and emails or photos that you took with the iPad) you can import them to your computer, transfer them into the folder in which you sync photos from and then sync with iTunes - or you can restore the new iPad from the backup of the old iPad.
Importing personal photos and videos from an iOS device to your computer.
How to backup and restore from a backupIf you haven't set up the new iPad yet, restoring from a backup is part of the activation process and you can elect to do this when you activate the device.