I know there's one that disarms all traps AND locks, but I just want traps gone.

EDIT: Alternatively, a mod that allows "Detect Traps" to stay on even when other actions are taken would be awesome.

In theory you should be able to use the mod mentioned above (removing traps/locks) - just disable lines regarding locks in .tp2 file before installing.

Example - BG2 Tweaks:
- unpack contents to your game folder (but don't run .exe file)
- go to bg2_tweaks folder, open .tp2 file with text editor
- scroll down to 'No traps or locks' component
- add // in front of lines:
WRITE_LONG ("%cont_off%" + 0x26 + ("%index2%" * 0xc0)) 0 // lock difficulty
WRITE_LONG ("%door_off%" + 0x88 + ("%index3%" * 0xc8)) 0 // detect diff
WRITE_LONG ("%door_off%" + 0x8c + ("%index3%" * 0xc8)) 0 // lock diff
- save the changes
- install component while installing the mod

However, that's just theory - I can't test it right now, as I'm at university.