[NH_Bulldog]

If tires are set properly to cold pressure rating (technically at 68° F with 1 psi added or subtracted for each 10° above or below). That’s the overly anal method, but in the real word check and set when “cold” meaning not driven on in past 3 hours. Either way rise in temperature in use should still keep you within design limits of the tires.

Now that being said, your actual tires will decide how safe this is. Stock tires (like Trailer King, or Power King) might pose a concern as they have a dubious reputation, whereas aftermarket tires (like Goodyear, Carlisle or Sailun) might give you more peace of mind.