Ah, the Tab. I've always wanted to get out there in the fall...
Late November is early winter on the southern Tab - it's all above 8k', and much of it above 9k'. Escalante northward might be ok, weather depending. Still cold though. For all of the Tab I'd think anything beyond mid-October is high risk.
GPS - it's been done plenty without. Even a GPS doesn't guarantee you stay on the route since there aren't any files floating about for it that I know of. Some of the turns are marked, some are not. Last time I was out there a rancher had put up a big fence right over the route - no gate, just a 6' tall fence. It gets primitive out there. I don't think you can too lost out there, downhill is hwy 50
Since I haven't been there in the fall I'm not sure what water would be like. In the spring it's lush and wet all over the place until you leave escalante, and after whitewater it is super dry and a lot longer than you think to GJ. I'd think a filter would be needed for a fall trip. Hard to say how much water...depending on weather 100-150 oz from whitewater?
The KT could see perfect conditions at that timeframe if it isn't snowed in yet in the La Sals.