Probably not what you want to hear. But I used bladders on my first 2 caminos and don't like them.
Hard to fill, potential leaks that go unnoticed (i ran dry twice) added weight of bladder etc etc .
#1 issue though. You can't see how much water is left and you can't monitor your water intake.
That's a BIG problem in my view.
Whereas bottles, mounted on the front of the pack, provide instant access, same as a bladder. (I use a tube)
But more importantly are constantly in view and so easy to monitor water intake.
And very easy to fill.
A bonus, (big one) is that the weight is on the front and acts rather like Aarn balance pockets.
I would never go back to a bladder.
Pic below is 2 x 1 litre bottles (last year on VdlP)
I did trial 2 x 1.5 litre, but decided 2 litres was enough for most days. (and it was)
For those few days I needed more I put 2 x 500 ml backup bottles either side in the pack side pockets.