do a search on "translational lift" with regards to scale or rc helicopters (same principle) to get an understanding of why the helicopter climbs when it gains airspeed. (same as hovering on a windy day, its all relative)

The stability of the heli can be greatly enhanced by the design, but which is at the expense of agility. A kyosho caliber 30, has a rotor head design that allows you to select if you want the great stability (trainer) or agility/responsiveness (intermediate).

If the heli is set up well, you should have no trouble landing it on a windy day, in fact you often get better performance on windy days. Constant wind being ideal, keeps the smoke away! Most beginners are reluctant to fly on a variable direction, gusty day, same as plankers.

Use a Heading Hold gyro, and even then keep the nose pointed into the wind for first time hovering. try it on a sim!