Use the basic filtration marked on the pack as a starting point and shoot some tests.
You don't need to use a whole sheet for this, just some strips (like a test strip in printing). It's much cheaper.
The problem that Cibachrome (the original name, changed to Ilfochrome when Ilford bought the technology in the 90's) always had was contrast - it tends to have too much. Sunny days might not give very good results. Try shooting on slightly overcast days (soft light).
I last used Cibachrome around 1980 and have never felt the urge to go back to it, but I don't see why it shouldn't work as camera 'film'.