Before I get started, last weekend I used the UsynligO app to go orienteering in Turkey Run Park.
Overall it was a very good experience considering there were no controls to find, only features, it's a pretty neat concept. After tweaking the GPS distance settings I was able to claim control locations much easier. If you are expecting speed runs, you will probably be disappointed because sometimes I had to wander around the control for what seemed like a long time before my phone acknowledged I had found it.
I've done some online research to see what other clubs are doing during this ordered isolation period.
Northeast Ohio Orienteering is putting on a simplified kind of Urban-O concept where you have to answer questions at the control locations - but instead of being outside, you use Google Street View (http://neooc.com/2020-virtual-cuyahoga-fallsquest/)
I think UsynligO is a very viable option especially if we use streamers. I was thinking that if people don't have a good enough phone, or don't want to take their phone, we could add something at the control people would have to write down to verify they found it. I was thinking something as easy as each control having a letter, (https://www.homedepot.com/p/Everbilt-3-in-Vinyl-Letters-and-Numbers-Kit-39793/303975024) or even perhaps a playing card stapled to the streamer? (I've got TONS of old playing cards that I have no idea what to do with)