Here are the revised clues for Sword in the Stone, Merlin's Grotto and  a new one for Sir Gawaine.
Sword has changed location, Merlin is unchanged, but I've linked the clues so this one set can replace the other two.

Sleeping Giant State Park, Hamden, CT (New Haven County)
The Camelot Series begins, by Bruce & Aili

Merlin's Grotto
Merlin was already ancient, older than any man could possibly be, when he sought his long rest in his cave. He had grown tired of serving so many Kings, generation after generation. It was time they learned to do without his sage advice, they hardly listened anyway.

Follow the path of Gold. Be watchful for a path of Green merging from the left. Follow this connecting trail. On this trail looking forward will show you green, looking back will show you gold. It is a seldom-traveled path though grassy vales. Nearing the end of the trail you will see the cliffs ahead. Turn to the left on the green trail proper, counting off 13 healthy paces (two footfalls). Look up the rockface. See the place where graffiti has been covered with dull brown paint. This is your destination. Climb carefully mindful of the many holes between boulders.

Upon reaching the crevice, which contains the cave opening, you will see what appears to be a throne naturally formed in the rockface left of the opening. There is a small flat place to stand next to it. From here, notice the sumac tree at a bearing of 175 degrees. Merlin hides under rocks at its base. Carefully replace the rocks so that they appear natural and the box is well hidden (no peeking corners). The youth of the area sometimes come to make patronage to the great wizard.

The Sword in the Stone
Now let us move forward in time. The great isle was in turmoil. Civil strife continued unabated in this beautiful, yet harsh land. Villages and town faced continuous threats from the invading Saxons. Magic and monsters roamed wildly through the hills and forests. From this troubled land, a boy-warrior emerged from the mist and shadows, to unite his people, and give back to them their pride and dignity. This was the boy who would be king. This king was named Arthur.
Each year since the death of Uther a grand tournament was held near the place where the sword waited silent and still. The winner of this tournament gained the right to try and pull the sword from the stone. No one, no matter their strength at arms, no matter the virtue in their hearts had been successful yet. So for many years the land was without a King.  Then one year Sir Ector traveled with his newly knighted son Sir Kay and his foster son, Kay's squire, Arthur to the Abbey of the Sleeping Giant to attend the Grand Tournament. All three were greatly excited. Sir Ector had not participated in the tournament for some time and this would be Sir Kay's first. Young Arthur was so excited he forgot Kay's sword, and did not remember until shortly before Kay was to join the tournament. Sir Ector told Arthur to hurry back to their lodgings and retrieve the sword. Arthur ran as fast as he could but soon realized he had lost his way.  In a panic Arthur looked around for someone who could help him. But he was alone. That was when he noticed a sword sticking out of a stone. Without thinking he ran to the sword and pulled it from the stone.  He then heard a voice behind him and turned to find Kay staring at him. Arthur tried to hand the sword to Kay, but Kay refused.  People began to gather around them in silence. For a short time no one spoke, then from the crowd stepped the wizard Merlin. Merlin said " Arthur, son of Uther Pendragon has drawn the sword from the stone!" With that the crowd began yelling " Long live King Arthur!!!", The sword is drawn, we have a King!". This is the tale of how a boy became King.

From the path below the enchanted cave, follow the Green east until you see, to your left, a large boulder, so large in fact, it may look like a cliff. Cross over the spring-fed stream and climb up the west side to the grassy knoll on top. Put down your pack and face north to try your hand at drawing the Sword from the Stone.

Sir Gawaine, the Pure
Continue on your journey. Eventually you will come to the trail with drops of blood upon it. Now follow this trail northerly. Your greatest hazard could well be being attacked by swarms of pixies (the real kind, mean, flesh eating, bloodthirsty, vengeful ones, not the cute little darlings of Victorian fantasy). Defend yourself with smelly liquids applied to your skin. It is the life-fluid of those who were ill prepared that marks this path.

From there, seek respite on the cool Path of Faith, heading toward the Abbey. As you meander your way uphill, you will see a striking little cliff face off to the right, a magical place, really, especially around Midsummer when the roses bloom. Continue up until youre able to walk above this pretty place, heading north directly off trail over rock and grass to a rounded boulder on which to sit. At its base, Sir Gawaine awaits.