G.B.
Truthfully they aren't going to sleep well at all. They are going to be so excited that they will run on adrenalin all day AND all night.
The best thing you can do is provide an environment that is restful and peaceful. Put a CD on with peaceful ocean surf, a classical CD of wordless hymns (piano or organ only), anything that will have a steady beat in the music 60 beats per minute or less.
This calms the heart so it will match the beat and kids tend to subconsciously pick that up and just slow down and start producing Melatonin and they fall asleep faster and it will last longer if it continues to play.
We played all sorts of stress management music the whole nap time in child care. We never made it totally quiet, the kids would wake up across the board, one by one almost as soon as the last one was asleep. They would be so tired and irritable.
You can check out the CD's at the local music store or find this type of CD in the infant department of Walmart or the music department.