The links below have instructions for deleting photos.
iOS and iPod: Syncing photos using iTunes
iPad Tip: How to Delete Photos from Your iPad in the Photos App
Another Way to Quickly Delete Photos from Your iPad (Mac Only)
How to Delete Photos from iPad
How to: Batch Delete Photos on the iPad
(With iOS 5.1, use 2 fingers)
How to Delete Photos from iCloud’s Photo Stream
Tom, Texas Mac Man, thank you for your posting. However none of the suggested sites answer my question. All of them either relate to deleting photos one at a time or to use of a Mac, not windows. One of them suggests a tap and drag to select multiple photos for deletion however things must have changed as this doesn't work on my iPad.
I've gome and deleted the photos through windows explorer which is step #2 in my original post. It now appears that all those folders are either camera transfers or imported photos or the camera roll and none relate to photos synced onto the ipad through Itunes. Still not a great option and bit tedious as you have to go into each folder individually on windows but better than #1.
Any other ideas?
Thank you Ralph9430, however that suggestion does not help at all.
If I upload a thousand photos during travel then I'll still have a thousand icons to click using your suggestion.
Likewise telling me I should have done things differently starting two years ago certainly does nothing for my current situation.