mats is nothing to do with if its wet or dry, its minimising the damage from divots on the fairways in the colder months when there is little or no growth.Thats fair enough, but does present the question of why you are using fairway mats when buggies are allowed on the course?
Surely if it's dry enough for vehicles, then it's dry enough to play from preferred lies?
i play at a links course that drains well, we never have a buggy or Trolley ban yet we use mats over the winter for the reason i gave above