I have found that zip-off pants work well. You can get them in lightweight nylon or something a little heavier, but they come in technical fabrics that dries quickly. They have lots of pockets and the legs seem to fit more snugly than the typical biking short, particularly if you get them just a tad smaller than you really need. The good ones are stylish and last about forever, plus you can zip the legs on when it gets cooler. They are great for touring, but a bit more expensive than jeans. I wear typical lycra underneath.