I found a vintage thread here on DXCC for SOTA Activators who sit on the hills for hours, like 2E0YYY, M1EYP and others:
It seems it is generally guys who don’t seem to operate from their home QTH much or at all, are the operators that spend longer on the summits operating. I can understand that.
73 Phil G4OBK
PS Some terrific DXCC totals can be obtained by the op’s who spend the time and effort on summits for sure if you read the vintage thread!