I will typically choose a position upwind of the area you wish to fill with bubbles (and crowds of lively children!) and stake out a 4-metres diameter performance space with bright-coloured bunting. I also set up the Bubble Mill.and lay out tables with equipment for children to make their own bubbles.
I have a powerful battery-powered sound system to play beautiful, relaxing, 'ambient' bubble music at any acceptable volume level, also a radio microphone.
My bubble-liquid is itself an effective COVID-19 sanitiser due to its high detergent content. Bubbles will not be made by breath-blowing. Risk assessments are individually discussed with event organisers and I comply
with all agreed precautions.