Thank you for the incoming responses. Yes, the only legal entries to Garibaldi park are: a) elfin lakes, b) cheakamus lake. The BT microwave towers is legal too (skirts the park borders).
These mentioned i already have done:
“skypilot used to be quite an adventure!”
“Approach to Cheam”
“Approach to Sky Pilot”
“West Ridge of North Twin Sister”
Please keep more ideas coming