+2. I have two tomicogs (16t amd 17t) that I have been using with a surly front disc hub for several years now on an old Monocog 26er.

Don't just bolt it up and see how it goes. Use a ruler and your brain to figure out what the chainline will be beforehand. Chances are it will be close enough and/or you'll find ways to adjust it. If fixed off road is something you are into, it would be a good idea to build a second wheel. Then you don't have to muck around with removing the rotor and all that everytime you want to go fixed.

If you have canti studs on your seatstays, remove the disc brake and install a V-brake in the rear. Then you can built a flip flop out of a SS disc freehub and still have the rear brake for when you flip to the freewheel side.