Option 1 - march as much of the closer as you feel confident with, and hold & play to the end. If you stand & play for too long, you may run afoul of the "frequency of movement while playing" bullet on the sheet.

Option 2 - If you have 5+ minutes of music, that you're really confident in, just don't play the closer. There is no programing requirement other than the time minimum/maximum. Save the closer for Area.