From Tataweka Hut, drop to the creek and head upriver, heading right at the 1st forks and left at the second. At the third forks, look for a marked track heading up the spur to the east between the 2 creeks. This starts good, steep but open scramble up the spur itself, but later becomes a badly overgrown benched track zigzagging up the face, Shortly before the summit the track swings north across the face, but it is full of windfall, badly marked and terribly overgrown. I found it far easier to climb to the ridgeline and follow that north.
Shortly before the saddle 500m north of pt985 the track returns tot he ridgeline and becomes clear and well marked. It then drops and sidles the western face, a cut benched platform on the steep valleyside, until it reaches the next spur. Once on it it drops steadily SW down the spur to the river. A bit of windfall slows progress, but it's reasonable clear of undergrowth and good dry dirt underfoot, not the mud of further west.
Reaching the creek, it;s another 1km downriver to the Tawawharara confluence - good going on rocky river banks. An old marked track sidles the last 500m to the forks on the north bank, but is not really necessary,
Note: Described in the reverse direction to your journey
The creekbed looks passable, but an old sidle track bypasses the first 500m of the Maniaroa above the confluence. A piece of marker tape on the south side of the Tawawharara Stream just above the confluence marks the start of an old track across flat terraces between the two creeks. A signpost in the middle of the bush and an old tent camp are passed, before descending to the Maniaroa 500m above the forks.
The remaining 800m to the next main forks are spent in the riverbed - the creek in small and there is good rock on both banks. The main flow swings south, and a small creek enters from the east - the forks marking the start of the track into the Tataweka. 20m upriver, a signpost points up the ridge: Tataweka 4hrs, Tawa 5hrs, Moanui Roadend 8hrs. Given that it's 8km from Tataweka to Tawa, the accuracy of the sign is immediately in doubt.
The climb to pt985 is good - windfall, but good clean solid dirt underfoot, not the slippery mud and tangled undergrowth of further west. Surprisingly soon a triangle points right off the spur, and a benched track sidles right (east) across the face to the saddle
Where the good going ends. The track follows the clear ridgeline for a few hundred meters then inexplicably drops west to sidle the steep, overgrown face. The face is cut by several dark, tight gullies, and intersected by several spurs A good cover of fern obscures continuous windfall on the ground, and hides dropoffs where the once benched track has fallen away. It's not fun - give me a pack of triangles and I'd remark the track up and over the summit in the good bush.
Eventually, the track decides to descend somewhere east of pt985: zigzagging down in such tight zags that it crosses the same windfallen tree 5 times. Under all the rubbish it's still a benched track - cut on a gradient for horses. Once. Finally the tramping track gives up on the benched track and, encountering a steep descending spur, follows it to the creekbed at the forks. A great improvement.
From the forks due east of pt985 the route follows the river downstream. The valley floor is true Waioeka: broad expanses of loose rounded river rocks the sze of apples, stretching the width of the flats. A small stream wandering down them, undercutting each bank in turn to ensure the maximum of required crossings. The creek is low when I visit - knee deep at most, but it;s slow going on ever shifting rocks.
Two more creeks enter from the south, and we remain in the riverbed (maps showing a sidle track are lying). Shortly after (20m-ish) the second creek a worn but unmarked track climbs south into the scrub. Following it some 40 vertical meters we emerge onto a grassy platform overlooking the forks. Tataweka Hut sits at its rear.
The sidle track at the confluence at the beginning is not worth following, but interesting to see the old hut site on the terrace.
The windfall coming down the eastern slope was horrendous. You may find the going a bit easier a couple of hundred meters to the south. Follow the blood trail left by my shins.