hello everyone! maybe I can help a bit with this problem. I walked camino invierno in september this year, and mostly had no problems finding my way, using both the waymarks and my description. the two parts in question:
1. from A Vide to Moreda.
the route follows LU3204 to A Vide, or better, A Corsa, as its board says. at the start of the village, after the bridge, veer L into the village. the street bends right and ends in a fork at the connecting village of O Rego. go right on an overgrown cement track to the next fork. fork right down to LU3204 where you turn L along it for a few meters then cross it for a path to the left of a pink house and an electricity pole. this path was overgrown with thorny bushes that kept latching onto my clothes and ended on a gravel/dirt road. turn right on the road, pass under a highway bridge then turn left to a dirt track that immediately goes under a canal. when it bends right, go straight ahead to a grassy/dirt track that soon becomes overgrown with oak branches and other stuff. keep in a straight line, some stretches can get very muddy and flooded in the rain, to As Lagoas then Os Campos.
you can avoid the first thorny path by staying on LU3204 a little longer, till a low white house with an arcaded porch. before it turn right to the gravel/dirt road that passes under the highway bridge.
and to completely avoid the muddy/floody section, stay on LU3204 all the way across CRG2.1, on the way - in a hairpin bend with a pink parking lot, a stage and Moreda church down on the right - joining the main route.
2. from Pazo de Reguengo to Camino Grande
about 100m after the pazo wall ends, at electricity lines, turn sharply left to a path/stone-paved track (former medieval road?) and when it bends right up, keep straigh on on a path that leads to Castrotane where the english lady, Penelope, runs a casa rural and has been arranging a refuge for pilgrims for some time (it wasn't yet ready when I contacted her, but some italian and franch pilgrims stayed at hers in autumn 2010). before the house on the right turn right up to another stone-paved track. go right in two forks and in a T intersection on top, and you will end at the fountain in Pineiro. pass it, cross LU4112, ascend a dirt track and reach a fork after a big walled meadow on the right. here comes the part where I saw no waymarks where they were needed. after the big meadow fork left, the track becomes overgrown then widens and ascends. cross a dirt track to continue a bit left, along a fenced meadow. fork right, go straight on a tarmac road (left is a village of Viris), straight again in a crossroad, then veer left up a wide dirt/gravel road (there are dogs on the right). bend right with it and descend to a T intersection. turn R to a dirt track, then fork right to a more grassy track that gently ascends then more steeply descends, crosses a stream and ascends to a T intersection. turn left up into Camino Grande.
hope that is detailed enough that you can follow it with no problems.