Are they against mandating it? Most of them are, but they still wear one. But I don't think many wear them outside unless asked or mandated.
I coach my daughter's CYO soccer team and the league mandated that all spectators wear masks. Almost none of the parents wore one because it is outdoors and people aren't forced to stand close to anyone. When CYO threatened to cancel the season because their "observers" reported people weren't wearing masks, everyone started wearing one. And they didn't complain.
My other daughter plays HS soccer and the rules are that only family are permitted at games and they have to be masked. You need to have a mask on to enter the stadium. There is 100% compliance in the stands once people are in.
I would say that 80% of both of these groups are pretty hard core conservatives.