Sounds like you have a great trip planned. I wish you all the best with it.
You are talking about an awful lot of water to cover on your list. Mid March is a bit later in the season so some of these waters will have seen quite a lot of angler activity by that stage. The Hurunui is in North Canterbury. You don’t mention your preferred fishing method?
Didymo we’ll ask Fish and Game about it and post here. It is an atrocious problem in some Southland
I’ll have a think about other places you might like to try over the weekend.
Best wishes – Yellowfin