No, that's pretty much still the way it is in Rural Wales.
I was driving back to Pembroke from Newcastle Emlyn the other day, having decided foolishly to try and get there (NE) by cross-graining the countryside, and got very low on fuel as a result.
I must have passed four or five petrol stations, at 2030, on the way to Carmarthen, all of them closed. By the time I got to Carmarthen's Tesco (blech), I was running on fumes - the tank's capacity is nominally 50l, and I got 52 in there.
Definitely fill up at every opportunity. You'll also save money - some of those backsunded middle-of-nowhere petrol stations charge 5 or 6p/litre more than the cheaper places.