Great report on India, Gedöns! I don't know the south of the country, but I can second your impressions on the north. I was in Himachal Pradesh many years ago and obviously things haven't changed, cannabis is omnipresent, it is growing literally along the road. Was often invited by some locals along the way to smoke charas with them and in the area one should have no problems finding some nice hand-rubbed to buy.
Here a snapshot of some plants growing in the wild:
Unluckily it was a little too early in the season to bring seeds. A good excuse to go back there
The Himalayas are absolutely beautiful and I recommend anyone who has the opportunity to travel there!
I didn't brought any seeds from the north, as I travelled there by plane. But I send myself some seeds from the southern bagweed, as I came back.
I lost many seedlings due to dumb mistakes, but the 4-5 who survived didn't come out any good. Soo be shure you pick of only the best weed. Hahaha