The structure on the hill looks like an old fortified keep - a stone wall surrounding a courtyard, with some rooms built inside more than likely. There was once a tower probably, but it, like most of the walls, has collapsed. The walls themselves get above head height in only a few sections, most noticably towards the back where there is a large solid mass.
The hill around the ruins looks to have been cleared once. But there is some growth on it now, suggesting that the fort has not been used in many years. It would be possible to approach fairly close keeping under cover most of the way given care. From where you stand, swinging around to the north a bit would seem to give the best cover.
Hadarook's ability to move without being seen or heard is almost pretanatural. More than once he has dissappeared form sight only to reappear some time later from another direction right at you side. You suspect he gets a kick out of giving you a start. He slips off a head, with his dog at his side this time, and his bow strung and an arrow ready. You head north for a bit, then wind round to appraoch the hill from the west. The going is a little slow. Several times you are forced to move at a crouch, once to crawl. But about 30 minutes later you find yourself about 200 feet from the south west corner of the building. A gate is visible in the south wall. There is no movement from inside the ruins. The ground around the ruins is more open than the rest. It was probably more carefully cleared. There is cover here and there. Some blackberry bushes. Some trees. Some schrubs. But it's scattered, with on average about 20-30 feet of open ground between.
Hadarook motions you to come up.
"We would have to break cover from here," he whispers. "We are also being watched. I think. Maybe. Probably the goblins. From over there," he concludes slowly with a shrug off to your right. "I'm pretty sure that they would know we are here, if they are here. We weren't all that quiet."
The hill, however, is. Very quiet.
"And there is something else. The dog is agitated. Something he can smell, which could mean from the ruins. Its not the goblins, the dog knows the smell of goblin."