Anyway to monitor temps inside TT when gone for day? ideas?

Dog Folks wrote:
Lots of parks do have a rule about unattended dogs tied up OUTSIDE.

Every place that we have stayed has had a sign posted prohibiting "leaving pets unattended" with no mention of inside or outside, I assumed that meant both inside and outside.

Have I been interpreting the signs wrong, that only means do not leave your pets unattended outside, but OK to leave in the trailer? If that's the case we may bring our dog along a whole lot more often! She hates it when we don't take her places!