We are an older couple with some leg problems and would like to do a 2 or 3 day trip to Kakadu after a few days in Darwin. We've been doing some reading about places to see in Kakadu and there seems to be a lot of climbing involved to get to some of the sights. If this is so, we are wondering if we should give it a miss. We'll probably go to Litchfield as well. We would appreciate any advice.