I will probably just concentrate on one park, and the surrounding areas. I reckon it will be Murchison, with trips to Budongo, entebbe, and Mabira forest between Kamapala and Jinja. Based on your experience, do you think this is a wise choice?
Uganda is amazing, good birding in all corners, but as already said, you really can't beat Murchinson - abundance of mammals, numerous birds, mostly very easy to see, many habitats in a relatively small area, quite simply the best single locality in the country if you are not particularly chasing endemics (in which case you would need to head to Albertine Rift hotspots)