I for one would find it useful to learn what time your ‘early’ morning class is. It may also be good to know what time you normally eat breakfast on regular non-yoga days.
I practice at 6 am and drink a zico an hour before + a 32 oz bottle of water on my commute to class. I do find I have a better practice this way compared to when I practice later in the day with a light meal 3 hours prior.