On any given night, about half of the rooms will be occupied, with one or two guests a piece, plus another few people staying in the large cheap room. Around a dozen locals can also be found around the bar throughout the evening. There's less than a half dozen employees, who normally stay in the back room, unless there's free rooms which there usually are. Because the stables are smaller than the number of rooms, they're usually full. Not pictured: nearby hay silo.
The two round bits are watchtowers, three stories tall with spiral staircases, which have line-of-sight over the roof. They normally only keep watch at night or if they expect trouble, and the "guards" are frequently drunk and shiftless. If the Inn is actually attacked, the Innkeeper is mostly confident that the traveling watchmen and adventurers staying there will try to defend the place as a matter of course. When it was first built, the Inn was supposed to be fortified, so the ground floor walls are mortared stone with small windows. The stables and back room are wood, as is the second floor, with more ordinary shuttered windows and little glass.
Under the bar and the main room is the cellar, accessed through the small stairway under the second-floor stairs in the back of the bar, and a heavy hatch in the stables for large kegs (which I didn't think to draw). The red thing is a fireplace, which extends over the roof. The forge is just a shack for shoeing horses, kept separate for fire safety, and the part-time smith is supposed to keep his tools inside in the cellar. He doesn't always remember to.
The main road runs east-west on the north side of the Inn, with rolling hills and sharecropper fields all around. The south and east sides are more wooded.