Train
The easiest way is to land to Vienna, and then take a bus/train to Bratislava, Slovakia (~1h10) then Bus to Modra (~40mins) .
Flight
For the most motivated, Prague visit is also possible before/After the wedding on specific request! Prague - Bratislava (4h30)
Hotel
We booked from the Friday 25 to Sunday 27 (can be extended) three apartments with 13 persons capacity from 5 minutes walking of the wedding venue !