I was at Yeovilston in '82. Oddly enough I don't remember seeing the F104's but I still have hearing damage from the "re-enactment" of the retaking of Port Stanley.
They airlifted in a battery of 105mm howitzers about 50m from the crowdline and then seemed to use up all the blank ammo they had been issued for the year. I got stuck in front of Motorheads speaker stacks a few years later and thought it was restful in comparison.