I bought some Adidas ones that are really light and pack down really small. I think they might be golf trousers but they are just dark grey . They have mesh zips down the side to help stop overheating. The boyfriend has some Berghaus ones that are more heavy-duty.
I must confess that in Norfolk, when we came across a narrow path through oilseed rape where it had all collapsed onto the path we wimped out and went around the side, you are clearly made of sterner stuff than us! It wasn’t because it was wet either, it was a hot day, the path just looked really difficult to follow.