It may be slightly inconvenient for the airfield to call them but I alway get a jolly person and I've never regretted it.
One airfield I rang told me they were freshly closed due to a wheels up landing blocking the runway , I replanned. One I didn't ring ( Alderney) had no fuel due to the fact they had just poured it all into the clubhouse- that was very inconvenient. And the worst one I rang 3 times ( duxford) to be sure I would get in which they affirmed then were too busy to let me in when I arrived ( I wrote them a strong letter)
I always ring... But that's just me.