Most of the action is well within the class V league. If you are not totally solid on this sort of water don't even bother getting your boat off the car. The portages are in the first third of the trip where the river moves away from the road. Scouting is necessary for much of the journey. It is possible to bash back to the road at any stage if conditions get too bad (or good!). The gradient eases just before Falls Creek, but at the flows necessary for this run the water stays pushy right to the Marion Creek swingbridge.
To get to the put-in; Monkey Creek flows into the gentle upper valley area just below Homer Hut. The creek is signposted on the bridge crossing it. Make your way down the creek to the river.
To get to the take-out; Falls Creek take-out is on SH94 1km west of the Hollyford Valley turnoff. Marion Creek swingbridge is 1km down the Hollyford from the turnoff.