Dealing with running (4 yo)

Our 4 y.o getting better at removing or using child locks now and going outside solo.

Had five incidents in past 3 months of him breaking out of harness / getting through a gate / opening a door n running down roads.

Seems a common issue, as police were a bit chill when they had to nab him the last time.

At hotels best weve done is stacked suitcases in front of door and hope noise / movements of him getting out of bed will wake us but really hard to sleep n take him out right now.

Appreciate any suggestions for how to get a good night's sleep without tying him to a bed.