Mbor: 8974269132 - This man is really one-stop shop. He knows all places, knows most local people, can arrange acco anywhere. He's a scuba/ caving expert with all kind of custom packages - he's taking a couple of people on a 15-day backpacking trip across Meghalaya (with public transport only), takes groups of 10-15 days on exploratory treks, etc.
Mawphlang: John - 9856455948; Warjri - 9856943249; MaplePine / Kenean Homestay - you can find number online
Sohra - 5 pearls homestay - you can find number online
Tyrna: Minot / Cleven - 7422082355 / 8787780546; Serene Homestay in Nongriat - number you can find online
Mawlynnong: Nongroi - 8014950233
Shnongpdeng: Halatong Tourist Homestay - 8731096536
Shillong, Matshatsngi Holiday Home, Laban: You can find number online
Once I upload pictures, I shall share the link here . :)
Why Dawki? Why not Shnongpdeng or atleast Darrang?
What does your final itinerary like?