(Edit: Did a couple more runs and explored the game a bit more)
Kinda what Hank said earlier, I don't really think there's a lot incentive to expand to multiple lanes. Especially because it costs a lot to put down a unit.
Since, the cost is high initially, I was really wary of using a unit willy-nilly. But once I tried placing more campfires and trying different units, I realized I earn fire more frequently, which was super nice <3
Super super fun though, good job with the game !!:D