This one can already achieved right in White Orchard.
Start in the southeast, right of the Abandoned Village marker. Head over to the left of the same marker for the second one. Either teleport or ride to the Sawmill marker, you'll find #3 a bit north of it. Cross the river via the bridge, pass the Mill marker and the two ones found north of it are the remaining #4 and #5. If you've cleaned the area already, you should have plenty of time left, before the first one runs out.
Just note, that for being able to get this achievement, you have to make sure, that the General perk "Gorged on Power" is deactivated, meaning not put into a perk slot. This one will make a bonus to last forever, but there can only ever be one active at a time, which is exactly not what we need for this...