Terrain
There are a few steep climbs, none of which is over 200 m. As short as they are, these climbs are strenuous. Some may require using your hands to hold on as you climb up or down. None are technically difficult. None require ropes or other special equipment. There will be some places where you have to step from stone to stone as you walk along the edge of a creek.
You will definitely have to float your pack across one or more flooded creeks.
If you can’t swim at least 100 m unaided, do not do this trip.
You don't need to be a great swimmer, but you do need to be able to swim.
Even in the boggiest of seasons, Kakadu has nothing that can compare with the mud of Tasmania. However, if you have a particularly wet year, you may find yourself sinking up to mid calf regularly on some days.
Vegetation
Much of the walking is through relatively flat, open woodland with a grassy understorey. Some short sections of grass may hide a broken rocky surface where you will have to be particularly careful. There may be some slow sections where you will have to pass though thick scrub.
The vegetation can vary dramatically from year to year depending on when last burnt. The spear grass normally reaches its peak in March, often three or four metres tall in some areas (much shorter in others). We may encounter short sections of partially collapsed and seeding spear grass during some portion of the trip, but this early it is unlikely that there will be much.
4-6 hours per day. A few days will be longer. The first full day of section two is normally the longest of the trip.
You need to carry 10-11 days food. This will include about 2½-3½ kg of the evening meals. You do not need a sleeping bag but you do need a tent with a fly.