Basically, yes. Once you've got a few golf balls in the nest, there's no need to add another one each day--a hen doesn't seem to notice whether it's 1 or 3 or 12 or 50.
It's best if the eggs are a week old or less when you put them under the hen. If you write the date on each egg when you find it, you will know how old each egg is. (An ordinary pencil is good for writing on the egg.)
If a hen doesn't go broody by the time a particular egg is a week old, you can just eat that egg.
Eggs for hatching should not be stored in the refrigerator. Recommended storage temperature is about 50-70 degrees (Fahrenheit). A basement is often good, or any room in an air-conditioned house might be OK. Warmer than that can make a chick sort-of grow but then die.
You can put the eggs in a carton, big end up, and just add a new one each day. Some people think you need to "turn" them each day (put one end of the egg carton on something so it's at an angle, other end up the next time.) Other people say that doesn't matter.
Avoid shaking them around and scrambling their insides
Hens are more likely to go broody in the spring.
A broody hen quits laying eggs. But the other hens in the flock keep laying.
So you could just eat eggs like normal until one of your hens goes broody, then start collecting eggs laid by the other hens. The broody won't care a bit if she's hatching someone else's eggs. (But do put all the eggs under her at the same time, so they all hatch at once. Do not give her eggs one day and the next and the next.)