Shoud I use bikers, biker's or bikers'?

If there is more than one biker going then it is a bikers' festival.

Each in its own place.

I take on a biker's attitude when I join a group of bikers for a ride, being respectful of the other bikers' bikes.

Thanks for the help!

Slack, the trend is away from a 'pos no matter what. Otherwise

bikers festival--festival for bikers

biker's festival--Either a bikers festival or a biker conducting some other kind of festival

I wasn't sure about that one but my Better Half, much smarter than I, agrees

Biker festival--either a bikers festival or a biker's festival

bikers' festival--A biker festival emphasizing management by more than one biker, as in, "I'm not sure whether it's a runners' or a bikers' festival"

I think it would be a Biker Festival.

Okay Punk but what would be

I think it could be either bikers festival or bikers' festival.

All I see is "Bike Week" when I googled it.

Use should.