I have never had problems with scratches with 35mm or 120 roll. But sheet film is a different story. My guess is that I am at fault most of the time and most of my scratches occur when either loading or removing film from the holders.
A few years back I standardized on TMX Readyloads for my field trips. It's an age thing But while I significantly reduced the weight I was carrying, I also had the benefits of no dust spots and 100% scratch free negatives
I still use regular sheet film in all formats and every now and then a negative will get scratched. But interestingly the scratches seem more prevalent with 4x5 film, and my 5x7 and 8x10 seem to escape the problem.