Golok,
In the tropics your main enemies are insects, chronic wetness, and plants that tear and scratch. It cant be stressed enough how hostile the ground is in a jungle. Really just about any tropical environment is going to be pretty nasty, even to sit down in. Here in Brazil there are more varieties of ants than you can imagine. Where I live we dont have Jungle in the classic triple canopy sense but we do have Mata Atlantica which is dense tropical forest. Here you cant sleep on the ground until you get to the higher elevations and even there its got more ants than you care to deal with.
You have to get off the ground and limit the pathways that insects can take to get to you or you will be miserable. You will survive the night, maybe a few nights, but you will not sleep and you will get eaten alive. Add to that the fact that thorny plants will shred your clothes and skin and you cant dry off. Your health and mental outlook will start to deteriorate real fast.
I carry a lightweight hammock that is about 15 x 10 cm rolled up with two strong ropes to hang it. I also carry a 10-meter cord and a poncho or tarp to rig over it. In my area at least the mosquitoes arent that bad. I do get ants that run down my cords and get into the hammock at times.
If I didnt have these items but had a machete I would build a bedstand and a rain shelter over it and make a real smoky fire to drive off the blood-suckers. I would also consider smearing a thick layer of mud on exposed skin. Seriously though, if you are going to go into a jungle, near a jungle, pass through a jungle in a boat, or fly over one in a plane, you really need to carry the bare minimum to deal with it. Mac