A Little help from around the U.S.

[Nevadaref]

In Nevada there are three HS boards: North, South, and East.
I'm in the North. Due to the way the schedule is done up here, we work both boys and girls in the same night. In the North, the 4A (largest) schools play three games at each site on game nights. One site has three of the four lower level games (JV and FR), while the other site hosts the remaining lower level game at 3:45PM followed by the two Varsity games. Which lower level game is played with the varsity games rotates from year to year. Typically, an official will get assigned the JV/FR game and then one of the two Varsity games or be assigned the Varsity double-header, but not all three. Smaller schools play GJV, BJV, GV, BV all at one site and only a few have FR teams, which will play some other day. Some don't even have JVs.
So an official could do a boys FR game and then a GV after.
Now the East only has one 4A school, so teams send all three boys teams or all three girls teams due to busing rules, but not a mix.
However, the South (read as Las Vegas) is different. When two schools play, the three boys teams will be at one site and the three girls teams at the other. They start at 5PM and use the small gym for the FR game, while simultaneously playing the JV game in the large gym. The Varsity game follows the JV game. This allows the assigner to give officials boys games or girls games by selecting the appropriate site. Upon speaking with him personally, I have learned that only one official out of about 250 refuses to do girls games, so he simply rotates the officials back and forth.