If you expect your techs to go into informed or even suspected covid-19 infected areas you should expect to also pay them hazard pay....
Have you talked with them about if they are willing to even do it without extra pay?
Dan Bilzerian also went through BUDS with “broken legs” Big whoop.
They all get fractures like that going through BUDS, only the trophy seeking ones talk about it.
I do these events regularly. I play during the day, and on OPFOR for TCA. I used to do a lot of rifle classes, and found this has done way more for me physically and mentally than any rifle class I have ever participated in.
You don't get the same useful real world training clearing rooms...
Unfortunately a lot of us live in urban environments, so yes, concealment will be of great advantage to many. Show me consistent 3-500 yard unobstructed urban areas of potential conflict, and I'd gladly choose a rifle instead.