I buy a bowl of cut up melon (watermelon, cantalope & honey dew) and a bowl of mixed berries at Publix each week. That gives me enough for my glider kids to have a different fruit each night for roughly 6 nights. I add some frozen fruits to that - Mango (purchased in frozen cubes) and Papaya (I cut that up myself and freeze)
Cantalope and honeydew melons freeze well, watermelon does not.
I also keep frozen blueberries and blackberries on hand for nights I do not have another fresh variety on hand.
I prefer to use fresh fruits but frozen is also fine with my gliders.