Forshayer, Our outdoor minyan is doing similar, masks became optional a couple of weeks ago. Tent was used only duting Yamim Norayim when there were lots of people. We have about the same group as we had in shul, Rabbi included. As long as you doing out of the right reasons – prudence re:Covid (*), I don’t see a problem at all. R Lebowitz, YU, talked about this a couple of weeks ago, saying that return to shuls seems to be more complicated than leaving and other Rabbis reporting what common saychel says. R Lebowitz mentioned was sounds like a good criterion – it is a problem if you are now participating in other comparable activities, but not opening shuls. I do not, so it is not a problem. I would add a qualification to the Rav’s definition to exclude parnasa-related activities, where one is allowed to take risks that he does not have to take for davening with the minyan.
(*) US would definitely do better if people and government had a little more resolve. As opening accelerated in last 3 weeks, decline in cases over US in general stalled at the level 20x higher than Israel, including NE states that have slightly lower rates. R0 grew from 0.7 to 0.87 in 2 weeks and at that speed will hit 1 in a week. UK reaches a similar case rate as US and now has R0=1.5 ….
Vaccination rate reached daily 1% of population on the day biden gave a speech and now is back to 0.3% that Trump was doing. It seems the failure of the government was inability to achieve sustained high vaccination rates for 2-3 months as Israel did while people felt urgency, so now it is a struggle to convince people who do not see urgency. So, all power of government to fight COVID promised by Biden was a pre-election bluff.