cab1948:
Sorry to be late in giving my two cents worth, since it's now academic, but you may store my thoughts for another year!
I've done the 'partial' canal three times. Twice on Holland America (HAL), once on Princess. I am partial to both lines, regardless of the itinerary, as they both provide wonderful service, especially for us seniors!"
It is true that you may be able to find a smaller - i.e., less crowded - ship on HAL than on Princess, but that shouldn't necessarily dictate your decision.
For what it's worth, I have 50 nights aboard Princess ships, 76 aboard HAL.
With another 19 booked on Princess, and another 7 on HAL.
SWR