{vI'laS} means "fog, mist". {HuDmey'e' velbogh vI'laS}, perhaps?

Wanted something along the lines of:
HuDmey bIr HayDaq bIghHa'mey Hop tu'lu'.

But am still working on how to call the mountains misty as well.

Tolkien also called them the Mountains of Mist. Just say vI'laS HuD.

Where Tolkien uses the word dungeons in the poem, he doesn't mean the prison kind; he's referring to underground chambers.

A literal translation (without attempting to reproduce the poetry):

vI'laS HuDmey bIr Hay HopDaq
wutlh pa'mey jaQDaq DIS qanDaq
'IDnar qol'om wov wInejmeH malengnISchoH qaSpa' jajlo'.

Best I could do for enchanted gold without getting unwieldy.

-- 
SuStel
http://trimboli.name