- Harry puts on the Invisibility cloak
- Walks to the closest Muggle bus station
- Drives somewhere, anywhere.
- Meets the rest of the Order and is being apparated, flown on a broom, anything to a safehouse.
OR
- Harry puts on the Invisibility cloak
- Hides himself on the back seat of the Vernon’s car
- Vernon drives to Grunnings
- Harry leaves the car and meets the Order and is being …
Hmm, how to react to that? “Go through his brain and look for loose thoughts.”? (Sounds like Legilimency from Harry Potter world)