You can go ahead and put them out. I'm in eastern nc and have been catching swarms since the first of april. 9 total since the first. I use a 10 frame deep as the box. Mediums and especially medium nucs may be to small. I caught a couple last year that couldn't even fit inside a 10 frame deep. I use a frame of dark drawn comb, 9 empty frames and lemon grass oil. If u put pollen or honey inside it will draw unwanted bugs and pest. Good luck and happy trapping.