I thought I'd address the OP's original question:
like others have mentioned signs posted as "traditional territory" don't indicate that you are trespassing in any way or that your right to lawfully use crown land is extinguished in any fashion.
Thats the the simple version, but there are complexities that might be interesting to all of us:
They do indicate the approximate boundaries where status FN are legally entitled to use their status rights. Those rights do not include excluding you from the crown land in question.
they also may indicate an area under a land claim. That means there is a FN group looking to exert control over the land and therefore satisfy one of the requirements of their title being recognized. This is where it gets messy with the blockades and such. The FN blockades aren't exactly legal Per se. But in order for the court to recognize their claim over the territory, they must be seen as exercising control over the land in some fashion. Even just an attempt to restrict access is important legally.
Our law doesn't yet capture this situation, which is why it's important for the province in particular to create some more certainty around the issue. That requires better dialogue with both BC First Nations, and the rest of us. For those interested, the Tsil'cotin decision explains the latest legal clarification with respect to these issues much better than I:
https://scc-csc.lexum.com/scc-csc/sc...14246/index.do