We have just done a lot of work clearing and marking the Winterbrook tracks so you should have no trouble following the route. Allow 2 hours to reach the falls and 5 hours for the circuit by the Tramway and Maxwell tracks. Three hours is not enough. The Tramway track gets steeper, wetter and rougher as you climb up towards the Falls. Most of the Maxwell is lovely walking but you will have to walk the 3 kms or so between the car parks if you can't arrange a shuttle. You may want to contact the North West Walking Club as they sometimes have walks in there. If you feel the whole circuit is too much, just go for a stroll in the beautiful rain forest on the Tramway Track, you will be in the finest forest within 20 minutes of leaving the car park. The Falls are best after rain of course, they were almost dry in February.
The driving route is signposted at the road junction at Nietta south of Ulverstone. Take the C129 road to South Nietta and Smith's Plains. The road gets rougher as you approach the walking tracks. There are several side roads, keep an eye open for the green forestry signs to Winterbrook Rainforest Walk. The Maxwell track car park is on a spur which goes straight ahead just before you turn off to the Tramway car park. It has a small yellow sign and tapes. There is a collapsed culvert at present about 1 km before the Winterbrook crossing so you have to walk this section of road. Best to go in by the Tramway and return by the Maxwell.
If you look at theLIST website
http://maps.thelist.tas.gov.au/listmap/app/list/map and search under Winterbrook Falls you will get a range of mapping options and references for the car parks, and you can print a map. The walking tracks are marked until you get beyond a certain point on the sliding scale! The tasmap 1:25000 series is unfortunately on two maps Loongana 4041 and Lea 4040, Loongana covers most of the walk.