You can submit with just your final save.
The 10AD is optional and is published along with your final save for others to view.
As per the recent submission rules change additional games can be requested for verification by the GOTM game checkers (1000BC, 10AD, and 1000AD) which requires participants to keep these games until after the result are published.
I recommed you keep all you saves for this GOTM just in case. The 150AD should be suffice if required.
Glad to have you involved in the game.