God, I've never seen them done with a trailer hook before.
As these are going on 1/0 hooks, and will be used behind a 300 or 400 grain RIO big boy, don't think addl. wt. will be necessary. The trailer hook could be a 1 or a 2; a 2 may be more to the point as I'm fishing deep pools so very large hooks aren't hugely necessary. Many thanks my friend.
Also have the summer fly swap flys (crappy English there.) ready to go. Would you re-post your address so I can send them up to you.