From what all I have read on the topic, the white oaks generally bear every other year if the weather is right. The red/black oaks will bear every year if the weather is right. The key is the weather.
Here in the northeast the oaks flower in mid-May. You will see the long catkins emerge just as the leaves are emerging. If you have "soft" weather - gentle breeze, no rain, warm days - the pollen fills the air, the hood of the Jeep is a yellowgreen every morning for a week and the female flowers are fertilized. That is step one. If you have cold weather, pouring rain or stormy conditions the pollination is poor and the harvest cannot be any better.
Step two comes in June, July and August. You must have adequate rain. If it is dry summer, the fertilized female flowers cannot produce an acorn and the harvest will be poor.
Your mast crop is the combination of the cyclic nature of the trees, the weather during flower time and the weather during the summer. All three must come together to have a great mast crop. Here in the northeast we had a poor spring and a poor summer. The acorn crop is very lean.
I hope for better weather for next year.
JMC