Anytime between November to February as the climate is favourable. But till mid December the Rann would be a bit marshy. After mid Dec till February it will be in its full glory. Plan to visit the days near to the full moon. However, in those days its very crowded but its very beautiful...
Camping season for Rann is during Nov to Jan. Best time to visit is during this period. Moreover, there are lot many places to visit in Bhuj apart from Rann of Kutch.
Options can be like:
1. Mandvi, known for its clean beaches
2. Lakhpat and Koteshwar
3. Kaladungar, for splendid views and Magnetic Hill
4. Bhujodi, for local artefacts
5. Aina Mahal
6. Archaelogical site of harrappan civilization at Dholavira
7. Andabet for Red Flamingos. visiting there requires permission from BSF HQ at Bhuj
8. Chhari Dhandh, an unexplored bird sanctuary
9. Chavda Rakhal