Will the park be open during the holiday season to meet up (for Canadians and US)? Thank you

Absolutely! On Google maps however if you are coming from Canada DO NOT enter in the GPS Peace Arch Historical State Park, it will try to take you THROUGH the border! Put in 171 street and 0 Ave. Trust me, I once put in the park and that was a really horrible complicated day (crying involved.)

Yes. FYI the park is getting pretty muddy with the weather lately, so wear some boots.

https://globalnews.ca/news/7129956/treaty-ghent-loophole-peace-arch-park-open/amp/

Yes, but no gift exchanging.