Trees are few and far between. The Shockrise Fens are a marsh. As such, there are high reeds -- up to 8 feet in most places -- and steam rising off the marsh reduces visibility substantially. Encounters often begin at a range of 90-100 feet, if not less.
Reeds are in every direction. The river is back toward where you encountered the lizardfolk, but the river cuts through the marsh from one side to the other.
The steam makes it virtually impossible to spot dangers from the air using normal vision.
There are no "safe" places, but what you make for yourself. Danger is in every direction.