This idea comes from a recent dream where I was part of a special forces operation to rescue hostages on another planet. The terrain around the target was a water-filled swamp, so we got a specially-designed amphibious vehicle looking like the local equivalent of a hippo. However, recon informed us once arrived in orbit that the hostages have been moved to a nearby flat bog where our vehicle would be conspicuous, so we had to improvise...

Creating a small hovercraft from household materials (or in this case a cannibalized habitat module) is not very difficult, but the performances will be limited if you want to stay discreet.