first, regular season in Romania starts at the beginning of May and the 2 schools&kitespots in Mamaia usually open in May.
Wind is not very strong so a big kite could save some days
. Water is nor warm till mid June so a shorty or a ful suit will also be good.
Waves are medium size and no tides. Also no sea urchins and the beach is not crowded in April-May.
there are also some other spots where you can have some fun kiting as the wind could be different in the South than in North even if there's only 100 km distance.
if you have any questions, send me a message