I just got a set of the "Inktense" pencils for Christmas and I intend to do a lot of experimenting with them.
Really, any time you get a new art medium, experimentation is the only way to really know how it's going to work for you. Someone else's experiences might not be relevant at all, due to several factors that you can't know about or control. (relative humidity, type of fabric, how hard they pressed, detergents used, etc.)
My plan is to make some test sandwiches with a bunch of different fabric combinations (solid vs. print; muslin vs. quilting cottons; pre-washed vs. unwashed; fabric softener vs. no fabric softener....); I want to test using them before and after quilting (and before AND after quilting), intend to test them for colorfastness by running them through several washes with a variety of detergents....and mostly just to play and see how they behave for me! I will test drawing then wetting then drawing more; I will test various art styles; I will test on damp fabric....anything and everything I can think of. I write notes right on the test pieces w/Sharpie and save them for later reference.
This is a good thread though, I'd never heard the idea of using the aloe gel.