I have no opinion on the advisability of the U.S. situation being in Canada, but would caution everyone to be careful treading close to the fine line of legality (I.e. take-off/land outside)
Yes the airspace is under FAA control (here it is NavCanada) not Parks, but if a Ranger decides to write you anyway, be prepared; the NPS and the FAA WILL band together in court, and they will employ tactics similar to those already used elsewhere, including Canada. They will manipulate the charges to keep pulling you into court, lawyer in tow, over and over until you’re bankrupt fighting the charge. You may be “right” legally, but are you prepared to be homeless from standing on a principle? The city I live in has a by-law prohibiting take-off, landing or overflying any municipal property. If charged, it’s a mandatory court appearance. Of COURSE they can’t prevent you from overflying...they know that. They CAN issue you a ticket and make you take a day off to attend court. If you want to mount a reasonable defence, you’ll need a lawyer, and they aren’t cheap. You may be self employed or have an understanding boss, but odds are you’re going to lose pay for at least some of the time your waiting. Wait you do, losing pay, and paying an attorney, your parking, etc. Only to find after waiting for 6 hours to appear before the Court, the charges have been withdrawn. Did you “win”? Maybe, but it is an expensive, hollow “victory”, and one you’ll think about VERY carefully about repeating.
It’s VERY unfair, VERY unfortunate, but a VERY real possibility. The few “I can do what I want” pilots have put the vast majority of those willing to play by the rules, between a rock and a hard spot. The Gov’t feels they have to get a handle on things, and this is a very effective way to do that.
I respectfully suggest you give this a second to think about, while getting ready for your flight