Jungle Battlemap Idea
Take a look at Recon, they would blend well in Jungle Battlefield. You won't be able to notice them even if they are already on your feet. For sure most Recon will prone. Imagine, seeing monkeys swinging, deer running, rabbits hopping, alligators on swamps, etc... Everyone's footsteps should be audible. Even when deer should be audible. Imagine being surprised and thought someone is behind you but it's only a deer.
Also campers must be vulnerable to snakes as there would be lots of snakes everywhere so you must still be cautious. You must hear their hiss first though before being bitten if you don't try to stay away from them. For sure many will going to request for Medic. Side note, those who were bitten must still be able to move after they got bitten. They should be allowed to go to Medic themselves.
Also imagine, someone being attacked by bear, puma or wolf. You will hear some soldiers screaming for help and the roar of the predator. It would be fun. You must stay on guard at all times.
The terrain should also be interactive. Some trees are scalable. Swamps and Muddy terrain should make everyone slow and line of sight must be hard since there are lots of trees.