Directly behind the cabin is a hatch, containing the Vietnam lighter. Find a shed on the property with a hatch, go underground and find the last lighter.
The house is burned down, and has a swingset out front. The lighter can be found down this hatch.
Go in the shed and find a hatch to a bunker. Look in the backyard for a hatch to an underground bunker. If you want to save some cash, here are the locations: Holland Valley Lighter Locations
If you want to make it easy on yourself, it's possible to buy a map from the shop for $1,200 highlighting all of the locations immediately. Where are the Vietnam Lighters in Far Cry 5? The lighters are scattered all around Hope County, so to save you the time, here's where you're going to need to look. Find all Vietnam Lighters for the 'What They Carried' side mission in Far Cry 5 Ubisoft
