I played two 3-player Hinterlands/Prosperity games with this kingdom:
Tunnel, Quarry, Silk Road, Worker's Village, Jack of All Trades, Inn, Cartographer, Goons, Grand Market, Expand, Platinum/Colony.
There appear to be two competing strategies here. Worker's Village/Inn/Goons could be used for multi-Goons, and you could buy an Inn near the end of your deck to set up another multi-Goons for each shuffle. On the other hand, Cartographer/Tunnel can produce a lot of gold, with more coming every time your Tunnel is hit by Goons, and that gold could be turned into Grand Market, Platinum, and Expand to get Colonies and Provinces. Quarry could enable either strategy. (And the one card that nobody tried was Jack of All Trades; this would seem to be a good card with Inn or in response to Goons, although the silver could be annoying later in the game.)
Both times we played, it was the Tunnel strategy that won a close game. In the first game, a 5/2 start with 3 on the next turn forced me into the Tunnel strategy, as Cartographer/nothing was the only reasonable 5/2, and 3 was naturally a Tunnel with a Cartographer already in play. In the second game, everyone started 4/3 with Quarry/Silver (no need for a Tunnel until the discarders are out), but the strategies diverged later.