Hi Trev,
Soma dries out before Kaur & besides is often disturbed by local people. I was there in October -there was only 1 EP around.
Kaur should still hold a few in early February but usually by this time they are making their way back up river (they breed on the River Gambia between the section from Guinea Conakry to Niokolo Koba in Senegal) & by mid-February are only at Basse & further east.
If you get the first ferry from Banjul to Barra it is possible to drive up the north bank to Kaur then catch the last ferry from Farafenni back to the south bank ---->Tendaba (this route passes right by Soma to reach Tendaba) -it is a bit of a rush however.
The fields around Tujering sometimes hold Bronze-winged Coursers & any recently burnt fields around Brufut->Tanji may hold Temminck's Courser -some of the better birding guides should know if there are any around.
I can't better the advice Birdboy has already given. I Didn't see Verreaux's Eagle Owl at Brufut or Abuko in October. The Greyish Eagle Owl roost at Faraba can be a hit or a miss & requires good local knowledge but a half-decent guide should know of a current Northern White-faced Scops roost.
Marakissa is always worth a visit as is Brufut (got a brief view of Yellowbill there in October with Modou Colley -first time for both of us!).
A night drive along the track from Kwinella (nr Tendaba) to Batelling (by Kiang West) can sometimes yield Bronze-winged Courser as well as Spotted Thick-Knee & the Nightjars suggested by Birdboy.
We had two pirogue trips from Tendaba in October -the afternoon trip was on a falling tide & was very disappointing but the dawn trip on a high tide was spectacular -I managed to get images of African Blue Flycatcher & White-backed Night Heron amongst others, but sadly no Pel's Fishing Owls around.
W-b NH:
http://www.pbase.com/rainbirder/white_backed_night_heron
ABF:
http://www.pbase.com/rainbirder/african_blue_flycatcher
It may be better to forget about Soma EPs & concentrate on birding around Tendaba (the drive from Tendaba to Soma is currently 90-120 mins one way due to the dire road conditions) -unless the locals know for certain that there are still some EPs at Soma it could prove a costly waste of time(the other problem with Soma is that the wetland there is full of junk, a bird of the quality of EPs is better seen at a quality wetland such as Kaur)!
Cheers,
Steve