Welcome from Canada.
I can only speak for myself but as long as you don't interfere with play, I imagine that there would be no issue.
HOWEVER, it's not normal for "non-golfers" to roam around a golf course as you've described.
If the marshals didn't say anything, I would guess that they didn't see you nor were you reported by other golfers.
I expect you might be asked to leave in the future though. Just an observation.
I can only speak for myself but as long as you don't interfere with play, I imagine that there would be no issue.
HOWEVER, it's not normal for "non-golfers" to roam around a golf course as you've described.
If the marshals didn't say anything, I would guess that they didn't see you nor were you reported by other golfers.
I expect you might be asked to leave in the future though. Just an observation.