As Daryl suggests, mitigation of the uncomfortable effects of lots of sweating is perhaps your best bet. I'm not a huge sweater, but when it's hot out and I am sweating profusely, I use a few things to keep me going comfortably. I've used two bandanas (one attached to my pack to dry out alternating with the other), a small MSR PakTowl (which snaps to my pack, absorbs a lot of moisture, dries quickly, is easy to wring out, but not the most pleasant to use on wet skin, I find), sweat bands, and my shirt to mop up. I've even used a bit of vaseline from cottonball firestarter (lipbalm works here, too, but can sting) applied to my eyebrows to ease sweat rolling into my eyes. But sometimes you just gotta sweat and bear it. Good news is, lots of sweating isn't a bad thing per se. It's a sign of a healthy body doing what it does to stay healthy. Just stay hydrated, hydrated, hydrated.