Gregaros returned to the wall, and attempted to circle around the goblin work party without being detected. He moved with painstaking care, patiently crawling ever so slowly around to minimise any noise he was making.
I hope I don't get hit by my own side...

Spoiler
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He won't enter the fray unless he can do so with a sneaky backstab, or else to try and prevent a goblin escaping into the keep.
Gregoras: AC 6, HP 1, THACO 19

Move Silently chance: 20% (what could possibly go wrong)
Move Silently roll: (1d100)[29]