In reply to Rog Wilko:
west to southeast:
trieste (napoleonica, sistiana, val rosandra (ca 1000 routes, lots of easy stuff),
osp (good campground, osp&misja pec have some easy stuff, crini kal lots of),
kamena vrata, for a days stopover,
rovinj (rovinj, dvigrad, limski kanal ... stuff for a week)
baska (easy stuff for a week and probably empty but good climbing)
all reasonably documented on ukc ...
siddarta "climbing without frontiers" for triest/osp/istria, climbinbaska.com & ukc for baska.
all good for may.
Post edited at 14:18