You walk to Forbes Library, where you can search online and also look at physical maps.
The nearest bend of Broad Brook itself is north of the library, but the forest around it stretches miles and miles to the north and west, not ending until…somewhere in Canada when the trees give way to tundra, probably. There are parts of that forest that have never seen the People of the Map, you're sure, miles of land still ruled by North America's oldest spirits.
You could conduct your initial research here, from the comfort of the circulation desk or a library computer: both physical and online maps might reveal evidence of a settlement, which would let you head toward the caern.
But not everything is online: instead of poking around on the computer, you could head out early and scout on foot. Patience and survival training would help you turn up evidence of previous occupation. Alternatively: Garou leave spiritual evidence of their presence, and though you don't know any Garou rites to sniff out occult energy, you might be able to rely on your spiritual awareness and attunement to find something interesting.
I'm smart enough to use physical maps to figure out where to go before I head into the woods.
It'll take great patience and endurance to find the Garou camp, but I know how to survive in the woods and where to look for settlements.
Garou theurges would have veiled their territory to prevent discovery, but I'm sensitive enough to feel out what's left of their power and follow it to its source.
I shapeshift into my lupus form and follow both my nose and my intuition to sniff out the magic of the caern.
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