I wear Accuvue 2's, which are good for 2 weeks if you take them out at night, or six days on non-stop wear, according to Acuvue. I take mine out at night at home, but leave them in for overnighters as it's not worth the effort for one night to take them out, avoid the dust and dirt of the trail find a place to hang/balance a mirror, etc.
I keep a bottle of re-wetting drops in my pocket, and when I inevitably wake up in the middle of the night, I re-wet the lenses. This generally prevents the foggy vision I get when I leave the lenses in overnight. I've never tried more than 2 nights, 3 days of continuous wear though. I'm going on a 9 day hike, and I'll bring two backup pairs. I'll probably take mine original pair out overnight on my second night and see how it goes putting them back in in the morning. If it's a failure, I can wear my first backup for the remainder of the trip.
My girlfriend has lenses than she leaves in for 30 days, and has no problem for the most part. I think a lot of it is eye sensitivity which varies from person to person. My eyes get dry at night, so at home I take the lenses out, rather than re-wetting. On the trail, I'll re-wet.
There are options, at least.