Getting there

Head to the Green Mountains section of Lamington National Park. The walk to Morans Falls starts about 1km before you reach the (O'Reilys) car park at the end of the road.  If the carpark is full you can park at O'Reilys and backtrack.

Maps

The walk is clearly marked. Track maps are available from the information centre.

Map of walk and surrounding area:
http://www.oreillys.com.au/docs/pdfs/track-map-430x390.pdf

Route/Trail notes

Follow the track! Make sure to follow the track past the first lookout (after snapping some photos) down to where the track crosses the creek (great place for a snack) and on to the lookout a few hundred metres further on. This gives a great view over the gorge out towards Main Range.

Other References

Just about any guide book/website/brochure for Lamington or O'Reilly's will have something on the walk.

It's also worth checking out Bernard O'Reilly's book "Green Mountains" which describes the family's move to the plateau, including their first hut near Morans Falls.

http://www.nprsr.qld.gov.au/parks/lamington/about.html#Half-day_walks_Green_Mountains