Money stays in my wallet on my body. Period.
I am not ever going to stash cash where it can be separated from me by accident.
If there is any more hide away cash I can slip it into the waste band of my pants or the backside of my belt.
I have a cordura wallet with compartments so stuffing a few (5) twenties and a few extra coins into it is no problem.
A tooney, two looneys, four quarters and 5 dimes is the small change department. That adds up to $105.50 as emergency cash.
The spare paper money and ID should be in flat waterproof pouches just in case your wallet gets wet. The little flat pouches I use are the same as you see used for sample collection.