For B&W film choice I would suggest two films.
- Ilford Delta 100
- Fuji Acros
The simple reason for these two is reciprocity failure.
Reciprocity failure means you subject brightness range (SBR) will be increased even further.
So, in practical terms, your darker shadows get even darker compared to your highlights.
Ilford quote a reciprocity failure of 1.26 ~ so take your measured exposure and raise it to the power of 1.26 - ie x^y on your scientific part of your smart phone calculator - where x is your measured shutter speed and raised to the power 1.26 - and the resulting answer is your required new shutter speed.
Delta 100 also has a great for subjects with a very wide SBR (tonal range) - just be precise with your development times.
Fuji quote no no need for reciprocity adjustment until measured exposure times exceed 120 s.
As for colour film you can Google reciprocity failure compensation factors.
Good luck
Martin
ps - don't forget your shutter release cable
