Ironman Run should I use a camlebak?

Thanks to everyone who has contributed ideas, all much apprciated.

I’m currently looking at using one of three strategies:

  1. Use whats on the course (at the moment these products aren’t working well for me)
  2. Take gels etc plus water (ordered some desoto pocket tri shorts to hold the gels yet to recieve/test, top pockets another option).
    3)Use a camelbak

I like the idea of fuelbelts waist belts but when i’ve tried them i’ve found them very uncomfortable, both on my GI system and also breathing (I must belly breath a fair bit when I run). In the future I want to get fuel belts to work for me, but 5 weeks out its too late for this ironman.

If I use a camelback it will most likely be a hydrobak (similar but smaller to the rocket I currently use). I find packs this size small enough that if i tighten the shoulder straps they sit high and firm around my shoulders, no bouncing and no where near my mid section (does still create a small warm spot though).
I would start with 52 ounces of fluid(or a bit less) and swap the bladder at special needs (or dump and do last half on coke/water). This means total start weight would be 62 ounces end weight 10 ounces (empty pack weight) so average weight would be 3lbs (or a touch less).

I know this is a fair bit to carry but anything that keeps be going is worth it.
Just one of three options at the moment, I plan to keep fine tuning all three options over the next few weeks and will decide closer to the day.

Thanks all.

PS: to the guy/gal who mentioned 20lbs, thats awesome, if you can drink 20lbs of fluid over a half marathon thats legendary, the guys I went to engineering school with would worship you!!! Can you do it with beer?