The problem is that we don't know if you can Travel out of TAR when you're only there in the dream state. I think normal Travelling would just get you to another place in TAR, based on the fact the weave used to get in and out of TAR in the flesh isn't exactly the same as Travelling.

My feeling is that this wouldn't work, even using Egwene's Tar-entering weave. I suspect something really, really bad might happen if you exit TAR this way while there in the dream state. It could sever your soul from your body or drive you mad or kill you, or stuff in this vein - or less dramatically you would just snap right back into your body the moment your dream-self tries to step out of TAR.