I would say the Davis Vipers is closest. I'm not sure where they practice but it's probably a 20 minute drive to Layton. The Brigham Sting is probably the second closest and it's probably a 30 minute drive.
Brigham is only fifteen minutes from North Ogden and we practice between Brigham and North Ogden. But I think the Vipers practice at Roy north park still unless they have moved in the last couple years so it is probably 50's either way.