There is no artificial gravity (or anti-gravity) in this game and a hovercraft requires an atmosphere to operate....
We already have the perfect asset, and it works in no atmosphere - it's called a Skimmer.
It really couldn't be that hard to put one under player control, and it would be crazy fun.
Or let's really mix things up - let us hijack existing skimmers from our SRV's via the data link scanner and use and abuse them as we see fit.
I can see the missions already: "Hijack a skimmer belonging to [%faction_name%] and take out the power generator."
This way it looks more like a malfunction, we don't get popped for crimes, unless our SRV's are discovered, or we botch the hack.