Slippery Dick, The deployment of the spoilers don't give away as much as you may think.
Ground Spoiler extension occurs after thrust lever retard and 1 landing gear compressed (nose gear included) spoilers 1&2 extend to 10 degrees and spoilers 3 - 8 to 15 degrees at a rate of 5 degrees per second. After 3 main gears are on ground spoilers 1&2 extend to 35 degrees and spoilers 3 - 8 extend to 50 degrees at a rate of 17 degrees/ sec. Ailerons also move to 25 degrees up. I doubt you would notice the initial deployment on the fin camera.