I’ve done two around the world trips so have an idea what’s involved.
Both were on open dated tickets which gave a lot of flexibility, not sure how practical that is today. Considered doing another ATW few years back and looked into first class rather than economy. Decided that the main place I was interested was India so just visited there. An advantage of ATW is that the shorter flights don’t give much jet lag.
Think about weather where you will be stopping, India before the monsoon can get well up in the 40s C.
With ATW tickets there’s no back tracking allowed, you have to keep going in the same general direction. What you can do is zigzag a lot provided you don’t exceed mileage allowed by your ticket. If I remember correctly mileage is figured from a hypothetical half way point. More and higher price if you dip below the equator. Visas will be needed, some you can now get online.
For camera gear my only advice is keep it simple, not too much. Pick what you plan to take and try carrying everywhere, and I mean everywhere for a week. You’ll soon know if you’ve made the right choice.
In crowded third world countries like India I’ve found a lens on the wide side useful. My favourite the 21mm Super Angulon, unfortunately not the best on digital.
One thing on my must take list, a really good pair of sound blocking ear plugs. Had them custom made to fit and found they work much better than anything else. Think the company was DBblocker. Helps to preserve ones sanity when the racket gets excessive.
There’s an India travel website that may help for that area.
www.indiamike.com
Cheers, Glenn