My current strategy:
A huge takeoff/landing pad, four hi-vis cones, some bright yellow caution tape around the cones, hi-vis vests with "DRONE PILOT" printed on them over a pair of green or orange overalls (but not near a prison!), drone safety signs, anemometer on a tripod stand (forget you have to move it from time to time, it looks good), a small folding table, a laptop, an official looking flight log, an official looking flight plan with lots of detail (you can use the same one each time), a map of the flight plan with red and yellow and green overlays, a compass, and a laminated 25,000:1 ordnance survey map.
Then stand with your legs apart, nipples thrust out as far as you can without falling over backwards (you know, the Marvell Super Hero pose), and make sure to say "Keep Back. We'll Handle This!" in a commanding voice when people approach.
If all that fails, invite them to look at the screen but not crowd your arms ;-)