Cave of Fire - Is there any quest/goodies to find here?

Hi, I've solved almost all the quests in F&I except for 3 where I have problems:
1. Comfort the Zombie Girl - I simply can't find enuf flowers anywhere (even tried all the shops in Vastares, Matras etc), hence giving up on this one.
2. Quiet the Orc - I spoke with the Orc and paid him to stop singing. Then when I returned to inform brother joram about it I am unable to find any dialogue to inform him about it. I only get the sword dialogue (I have already completed the Sword of God quest and handed it over to him). Now, when I return to talk to the Orc, his cabin is empty.
3. Kill Erhard's infected son - I 've looked everywhere near the Sulphur Peak East side but am unable to locate him. Will go back another day and look again
I accidentally stumbled upon the Cave of Fire entrance while looking for Arven in the East side of the Sulphur Peak.
I came across a red barrier and killed the Fire bird behind it, but am unable to progress further in the cave, is there any quest/some goodies to find here?
1. Comfort the Zombie Girl - I simply can't find enuf flowers anywhere (even tried all the shops in Vastares, Matras etc), hence giving up on this one.
2. Quiet the Orc - I spoke with the Orc and paid him to stop singing. Then when I returned to inform brother joram about it I am unable to find any dialogue to inform him about it. I only get the sword dialogue (I have already completed the Sword of God quest and handed it over to him). Now, when I return to talk to the Orc, his cabin is empty.
3. Kill Erhard's infected son - I 've looked everywhere near the Sulphur Peak East side but am unable to locate him. Will go back another day and look again

I accidentally stumbled upon the Cave of Fire entrance while looking for Arven in the East side of the Sulphur Peak.
I came across a red barrier and killed the Fire bird behind it, but am unable to progress further in the cave, is there any quest/some goodies to find here?