Reinfitz is east of Klagenfurt Airport in the south east.
You'll be around 2-3 h drive from a decent resort it seems but luckily many of the big resorts have good snow at the moment, around 2 to 4m base so fingers crossed it will hold well into May, especially the higher resorts. Luckily Austria has a few glacier resorts which means year round boarding.
Best bet is Kaprun probably as its close, a glacier resort and you can ride there all year round. If the snow holds then I would go to Obertauern for some epic freeriding.