Thanks to you both above for comments. I dont have a GPS but thanx for the offer.
It seems to be less visited, Sikkim, and the permit is annoying. But at least it's free. I will come up from Darjeeling, where I want to find my father's old school. Also I'll check out his childhood home in Calcutta, or Kolkata.
I might make Sikkim the trekking part of my trip, and bike in the warmer south round Hampi.
I liked Rajastan last trip, hiring a bike, because the desert was great and any roads I was on were quiet. Most roads in India make me believe in god, tho' that doesn't help!!!!