So, with the concert database search engine I've added a little surprise to the results.
Where the search results are batched in Tour / Engagements there's now a little button at the bottom of each Tour / Engagement where if you click to Expand / or then Hide you'll see additional results showing every song sung during that Tour / Engagement and the resective date for each concert that song was performed at as a clickable button that will take you to that concerts details if clicked.
So, if you go to the Database Search facility ( Concert database 1969 - 1977) :-
Then we could select either everything from 1970 or the last tour of 1977 :-
If you chose to go for the last tour the result would look like this after you'd clicked the Expand button :-
...with the option to then click on each button with a date on it to take you to that days concert details.
I hope its useful as another way to cross reference the concerts and performances of songs at an Elvis show.
I've stuck to the core of, if it was a song sung at an Elvis Presley Show, it gets included.