Sounds pretty complete for basics to me, even excessive, maybe. Both a 15mm socket and open end? Leave the open end and use the socket for your wheels, but don't forget the socket wrench handle. Then add a pedal wrench.

Since you're taking grease, I assume you plan to service the BB or hubs. If so, you'll need those tools, and while you're at it a chain tool, otherwise you might as well skip the grease.

Go back and review your current tools and consider which you've used in the last six months. If any of these are not on your list consider the likelihood that you'll miss them. Lastly, you're not going to outer Mongolia, so if it turns out you need something, you can either have it sent from home or buy it.