Garran notices that druid were considering his words carefully before speaking - he seen many people do that before lying, but does it mean druid know the location - you can't know that, can't read his mind, your instincts suggest though that is is no archdruid, but rather one more druid who - just like Ocelot were called to take case of the forest

Old man
Old druid looks at the map and studies it carefully leaving an impression that he is trying to memorize what he sees
Never been.The river, though... that is easy. Find the landslide's edge.
he points North
Follow east. It borders the water. River will lead you to bridge, jet journey is harder than road. As for the hill... The beasts see what I do not. Birds. Burrowers. May know of lone trees on high ground. But my back is old, and this grass must fall. Grab a blade. Help me cut. Then, I speak to the woods.
He taps the sickle against his leather boot, looking over his shoulder at the remaining thicket of tall grass. His eyes scan your group, narrowing as they linger on the chain mails of your armored companions. He shakes his head, a look of quiet disdain crossing his weathered face."Too much metal. Cold iron hurts the nature spirits. No cutting for you. He reaches back into his heavy canvas pack, pulling out a second, well-worn sickle with a smooth wooden handle. He holds it out toward Krynt and Atticus. "Take the sickle. Do it right and I speak to the woods."
Krynt has realized what's the old man doing - he clears the choking weeds and thick brush specifically around the bases of the young saplings, leaving them breathing room. He is intentionally freeing the trees so they aren't overwhelmed and strangled by the aggressive undergrowth
OOC:
If you agree to help druid I will need you to roll slight of hand check, Krynt could apply advantage to that check thanks to good investigation and if he shares his finding with Atticus both of you could roll with advantage, furthermore - I will allow Atticus to use Intelligence instead of Dexterity if player could neatly narrate the reason to use Int
Ot you could simply decide that conversation is over and we are walking around and to the river just as druid recommended, a longer journey through difficult terrain, but will be no problem to locate the bridge