In 2016 when I went into Maceos and some other crew bars I asked if I needed an extra band or not and they gave me one. In 2019 I asked the same question and was told my recycling crew one was fine. I didn't really have any problems in 2019 (though didn't try Acoustic during the main festival as i understand they weren't letting people in without an Acoustic band)but will probably ask again this year just to be sure.