Does Indian tourist destinations which you mentioned like Shillong, Chail etc have international stadium already built there ? If they already have the stadiums there, then they should host the international matches there.
As far as Pakistani cricket stadium is concerned, its newly built and i am hopeful we may see some PSL matches there in 2022.
If I am not wrong, Chail do have a cricket stadium which is being used for first class matches. The ground has a long history, having established by the Maharajah of Patiala in 1893. It is regarded as the highest cricket ground in the world with first class status (2,444 meters above sea level). The scenery is really beautiful, surrounded by pine and deodar forests. The boundaries are a bit small for my liking though.