For the weekend of May 22nd-24th we will paddle with kayaks in the lakes Kardzhali and Studen Kladenets. Here you can see the program, and for the tow days we have one extra day:
https://rafting.bg/en/kayaking-on-kardjali-and-studen-kladenetz-dams/
Overnight stays are in tents, but a hotel in the area can be arranged.