At Pipiriki travellers get off or on to the river in jetboats and canoes. There are at least six places offering accommodation along the road, ranging from camping spots to self-contained cottages.
The Operiki homestay and Ranana campground were closed at present, Ms Main said, but there were two new accommodation options. In Pipiriki the Haworths had turned the former school into a campground with cabins, and Tracey Marshall opened Te Punga Homestead at Koriniti last summer.
Several operators run guided and unguided canoe tours, and jetboat trips.
There's a day walk at Atene, and the entire road is part of the new Mountains to Sea/Nga Ara Tuhono Cycle Trail.
Most people are deciding to do the trail in sections, rather than end-to-end, and the sections in the Ruapehu District have been the most popular so far.
Ms Main has done the trail herself, twice. She said the River Rd end was attracting a few big organised groups, and a scattering of independent cyclists.
"They're mostly the kind of people who have already done the Otago cycle trail. They're looking for something new and they're delighted by the River Rd."
There was still about 12km of road needing sealing, from Ranana to near Pipiriki. It was graded in December but was still a bit rough for cyclists.
"It puts off quite a number of people. I've tried to bike through it and it's not easy," Ms Main said.
Many of the tourist operators on the road have banded together to market it, with a website called Journeys on the Whanganui.
They take its attractions to travel shows and share the cost of advertising, and they pass bookings to each other.