Your Weidu.log reports that Kelsey is installed, so the guy should be there. I can only repeat what's in Kelsey's FAQ: it usually installs fine(well, for the last seven years, anyway). Check Kelsey's usual "hiding place" past Keldorn's estate, next to the fountain, just in case. If that fails, then, yes, any of
- J#KLSY09 (offered to join when spawned in)
- J#KLSY11 (?)
- J#KLSY12 (?)
- J#KLSY13 (?) should do.
If you have any questions about BWP, I guess it's better to ask in BWP forum, but if you follow the standard route: download Kelsey mod from pockeplane.net/kelsey, run it, choose your BG2 directory, process with the installing(if it asks you to run Setup-Kelsey.exe again, just run it again from BG2 folder), and finally, start the game and go to the Government District, then Kelsey will be in his usual place: next to Keldorn's estate, past the fountain. In any case, best of luck.