I found one case of searching on private property without a warrant where initial trial court said it was a Fourth Amendment + Louisiana Constitution violation but the appeal court reversed the decision[2] and the state supreme court denied the review request[3].
I think it's probably nuanced? Like if a game warden sees you unload game from your truck them maybe they can go into your home without a warrant? But they probably couldn't legally pick a random house and search it for no reason without a warrant? I am not a lawyer, not legal advice, etc etc.
[1] http://legis.la.gov/legis/Law.aspx?d=105379
[2] https://caselaw.findlaw.com/la-court-of-appeal/1491867.html
[3] https://calculators.law/caselaw/decisions/x5yN6QjJe3Z0/cason...