I have just come back from Ghana. I found the Bradt guide useful and I have really appreciated your availability to receive updates
I was working in the Upper East Region and my colleague and I stayed in a nice lodge in Bolgatanga which is not included in the 8th edition of the Bradt guide about Ghana. It is called Sanat-Minat Lodge and it is on the Navrongo Road: https://www.google.it/maps/place/Sanat+Minatemail@example.com,-0.8770374,17z/data=!3m1!4b1!4m8!3m7!1s0xe2b3828d771e14b:0xa68203d3b0cda6a!5m2!4m1!1i2!8m2!3d10.8037732!4d-0.8748487?hl=it.
Contact numbers are the following: +233-549032876 and +233-505408075.
There are 11 rooms and suites, and prices range from 100 Ghana cedis to 160 Ghana cedis for a double.
The photos below show the inner courtyard and the room where I stayed, which is one of the two largest rooms available in the lodge.