I am a little unclear with the quarantine requirement. I thought the PCR test requirement is prior to departure? Would appreciate if someone can clarify this for me.

Also, few additional questions -

I am looking to arrive from mainland on xmas (landing in SKB late afternoon) then heading straight to ferry port for St Nevis. Is that a bit aggressive plan? It would be quite unpleasant to get stuck on St Kitts if they decide to stop the ferries on holiday. Although it's a cruise town as well so not sure....

Also I am looking to split the stay between St Kitts and St Nevis. Which of the two islands has more to offer in terms of outdoor activities (hiking/mountains/waterfalls etc)?

Any tips on car rental/ car insurance or specific type of cars for rough terrain (for both islands)?