The Extended Stroll - Situation

Within the next hour I’m going to take my first crossdressed long walk, wearing heels, hold-ups, and a short skirt. I hid one of my house keys about 15 minutes ago. Once I lock up the house, I plan to slide my only remaining key through the letterbox. There is no turning back now. I have to complete the walk—15 minutes each way—to retrieve that hidden key. Any advice? Has anyone done this before?:?