Can I use these eggs to incubate?

My muscovy has laid a ton of eggs. 22 at last count. Doing some research on line I have found that she probably will not be able to hatch them all herself. Also she only sets on them at night right now which I have read is not unusual at first for muscovys. So this morning I ordered an incubator online and it should be here in 1 week to 10 days. I have marked all the eggs this morning so that now I can keep track of any future eggs, so I know which are the freshest since some eggs apparently are already 22days old if she only lays one a day and has laid one everyday. So I guess my question is can I use any of these eggs she has already laid yet not setting on(keeping in mind my incubator won't be here for another 7-10days)? Or should I just start collecting the new eggs she lays every morning? Also either way should I leave the eggs out in the barn with her? Its pretty cold here in Ontario she sits on them during the night when the temp drops but they are not set on all day when the temp here averages around 9degreeC(41F I think)? Also if I bring them in how do I store the for the next 7-10days?
Sorry I have so many questions! I am very new to this but am very excited to learn from all of you more experienced hatching enthusiasts.
Thank you for your time.