I work chaps for one season. Way too hot and too noisy. Only usefull if you are also bustin some serious thorny brush. I've got boots now. The disadvantage of those is that even expensive ones are not comfortable to walk in for along distance.
When those wear out, I'm going to go with gaiters. That way, I can wear the footwear appropriate for what I'm doing (dry land walking, wetlands, etc.)