Hmm, I wonder...
I've only germinated seeds in a ziplock to test for germination. I use a paper towel and agree with the roots clinging/attaching to the paper so easily and causing problems. I might try some by simply soaking the seeds in water for a couple of hours and putting them in a ziplock. The moisture can't evaporate and a few droplets left on the seeds should work to keep the humidity/moisture level up. Just thinking...inside the ziplock.