There is not a direct boat from Polynesian Resort to Fort Wilderness.
You have several options:
Boat to Magic Kingdom from Poly
Boat from Magic Kingdom to Fort Wilderness(Pioneer Hall where The Hoop takes place is a short 2-3 minutes walk from the FW Dock)
Monorail from Poly to Magic Kingdom
Boat from Magic Kingdom to Fort Wilderness
Monorail from Poly to Contemporary Resort
Boat from Contemporary Resort to Fort Wilderness
I would allow 1 hour(to be safe) for any of the 3 options.