The thing about it, is it all depends on what the anti-gravity really is.
You have a stationary object in a gravity well. Said object is being affected by gravity and being pulled 'down'.
In a conventional scenario (no handwavium gravatics or the like) you need to counteract that constant gravity force in order to maintain a constant position. You can maintain that position using conventional landing gear (which will use the ground to anchor against and impart a potential energy on the object, down through the landing gear, to the ground). Using magnetics or the like doesn't change this. If you embed magnets/etc in the landing pad you are simply replacing the landing gear with magnet pads, but those magnet pads still must support the mass of the ship (all you're doing is replacing landing gear with magnetic force, but the net result is the same; the ground must support the vehicle).
The same thing effectively with thrusters or the like. A thruster works by shooting out mass at a velocity (aka 'energy') to counteract the effects of gravity. Said energy must be dissipated somehow. either directly on the ground (by the energy hitting it) or indirectly (by the energy hitting the atmosphere/etc and *it* pushing downwards ultimately to the surface (the higher up you are, the more diffused this effect is, but it's still there).
Now, if you want to start doing handwavium and have magic gravity-reducing or gravity-removing 'physics' that changes things. :)
Ken