Expedition station is one of the buildings in the River Run Village area by the main gondola. It's probably the farthest away while still in River Run, but it's still an easy walk, 250 yds. perhaps. It also means you're not next to a bar in the main village area (I don't know how lively things were - we went to bed early). There's underground parking, an outdoor pool and hot tub, an exercise room, ski lockers, pool table, and probably some more things we didn't discover. There's a skating rink out front too.
As condos, all units will be decorated differently, so there's some benefit to renting from the owner or a rental service where you can see photos of your actual unit. Our one-bedroom was in good shape and has nice features like granite countertops, stone fireplace (gas), flat screen TVs in both rooms, and both a murhpy bed and a sofa bed in the living area, so it could sleep six. It was also well furnished in the kitchen, and even had a humidifier. It came stocked with small bottles of shampoo, conditioner, and lotion like a hotel (which I didn't expect), but unless you pay more, there's no maid service (at least for 3 days or less) so you could run out if you stay a while and don't bring some. There were starting supplies of coffee, sugar, and S&P, and cleaning supplies as well.
Keystone had a offer if you rent from them directly, kids ski free. It's usually more expensive, and you can't tell what unit you'll get (other than general size) nor the building, but if you have a large brood in tow, it's likely worth taking the chance. With just one, it was better just to rent from the owner for me - try vbro.com for those.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.