The idea that local events are a major element to validate a trip always makes me hesitate. Honestly, who really benefits when we say that?
Often, it's tourism agencies or local offices that have an interest in attracting people to justify inflated prices.
The average Belgian first looks at the budget and leave dates, not the local strawberry festival.
For example, if I plan a vacation to the North Sea in July, I know it will be crowded and expensive with or without a special event; the reason for my choice is elsewhere.