Canada immigration requirements for Alaska Cruise ship

I plan to take the Alaska cruise ship sometime this summer from Seattle which ports at Victoria BC Canada for few hours (~ 6 to 11 hours). The cruise will return to Seattle port too.

Typically I would require a Canadian visa to board the cruise ship. It gets a bit tricky. I have a Canada PR card (Mar 2013, expiring Mar 2018) but I have never been to Canada since I got our PR (I am working in US on work visa). It seems my Canada PR is not valid (I'm not sure of this yet) as I do not meet the minimum stay requirement to maintain Canada PR card (730 days in 5 years in Canada).

Questions:

• Will I have immigration issues boarding the cruise ship from Seattle using my Canada PR card?
• If I clear immigration at Seattle using my Canada PR card, can I choose to not get off at port of Victoria and simply stay on ship?
• Or should I apply for Canadian TRV? Do I need to first renounce my Canada PR card?

Followup questions:

• Is there any way that when I board the cruise ship that the immigration officer is able to determine that I do not satisfy the RO and so my PR is not valid thereby not letting me board the ship? I ask as if this may happen then I will lose all the cruise money.

Other followup questions:

I ask these as I stay close to the border and I may vacation for few days at a later date.

• Is there a way to know if my PR is invalid as of now (some website, etc)?

• If the adjudicator determines that I'm no longer a PR at border/PoE (port of entry), would I immediately know that I'm reported? Do I lose my PR status immediately or after certain days (if so, how many)?

• Is it a bad remark on my profile if I'm reported? Basically, is it better that I myself renounce at the border? Would it affect my chances of my TRV at a later date?