Yes, you need to test your stove at home, outside, and figure it out for yourself. Your windscreen and wind conditions are as important as anything. If its breezy at all, I will take a sleeping pad and use as a secondary windshield, makes all the difference in the world. With a poor windscreen your fuel usage can double or more.
The worst thing that can happen is you end up eating cold food. Not that big a deal, some do that anyway.
I usuallyt bring too much alcohol. As much as I like coffee and hot food in the morning, we usually end up just eating poptarts while packing up, and hitting the trail. Last 2 trips we brought back half the alcohol (or more) because didnt do hot breakfast, or didnt do coffee in evening either, etc.