This is completely anecdotal advice and might not pan out, but IME Norwegian often has very light loads. This can result in you getting a whole row to yourself or at least an empty seat. This massively increases comfort (which seems to be your top priority).

The service recovery points are valid but I’m not sure they apply to you. Sounds like you’re headed on a long backpacking trip with no end date. Do you really care if your trip is disrupted and it starts 1 day later?