re driducks - agree that they are light and start off as waterproof, but in the bush in Australia and NZ, the rubber material tends to catch and snag on our scrub (teatree, gorse, blackberry, numerous other spiky plants I can't name but know all too well, etc), and as a result quickly leads to tears the outer, resulting in leaks. WPB materials such as Event, goretex, dryplus or any plastic material etc are generally better options, here at least, as the smoother surfaces don't catch and tear. I destroyed my driducks pants this way in a single day of heay scrub bashing, whereas some cheapo nylons were still going strong after weeks of bashing through fire re-growth, blackberries, NZ gorse, and Tassie scrub on river edges.
re ponchos - one problem that most reviewers don't often discuss is that you need to take it off to set it up as a tarp for the night. If raining, you get freshly wet just before bedding down, which is not optimal. The problem that no absolutely one discusses is that some more mature gentlemen need to get up make one or more toilet trips during the night, and if your water proof is your tarp, you'll get wet each time without separate rain gear of some sort. sorry to mention the unmentionable for some of the older guys.