You'll be fine, ASE. That road is very well travelled and if you do find yourself heading up the wrong way you can always back up and flag down a passing vehicle.
Here are a couple of tips:
- once you pass Youbou, you will drive for some distance along a section of road flanked by houses and cottages. Once you pass them you'll continue on until you get to the end of the lake. You can't miss it, it'll be on the left (note: along some parts of this stretch you go inland a bit, which gives the impression you've passed the lake but you haven't and will veer to its banks soon afterwards).
- at the end of the lake you'll see the road continuing west (STRAIGHT) and an option to turn left. Keep going straight unless you want to double back to Lake Cowichan along the SOUTH road (Youbou is along the NORTH road).
- you'll pass Kissinger Lake campground on your LEFT
- there will be several signs pointing towards CARMANAH. Stick with those signs if/when you see them, that's the direction of the Ditidaht Village (at Nitinaht Lake).
- rule of thumb is if you're on a road that is on an incline or a decline, you've gone off the logging main and should re-assess. You'll likely be traveling at between 40 and 60, which should take approximately 40 minutes to arrive at the Ditidaht junction where you'll want to turn LEFT to head to the village and the lake. You'll know when you get there. If you end up turning RIGHT for whatever reason, you'll end up on a large bridge crossing the Nitinaht River. At that point you'll want to turn around and head in the opposite direction. From the T it's about 8km to the village.
Hope this helps