In Germany ALL airfields are required to have fire protection equipment, even the smallest field. The minimum: two 6 kg extinguishers, two 12 kg extinguishers, fire axe, fire blankets and gloves, various cutting equipment, etc. etc. Plus someone always being present who has attended a first aid class (another reason for someone always needing to be present when there is flying activity). These regulations go back to the 1960's, so nothing new over here.
The equipment is supposed to be on a 4-wheel drive vehicle, but a small trailer attached to a car is usually accepted.
ALL airfields are certified in some form or another... and of course training only allowed on those fields certified for that type of aircraft, etc. Some glider fields are certified for TMG's but only for members of the local club, not for everyone.
I think the requirment actually quite sensible ... and it has even saved people's lives over the years.
Westy