Overtourism is the word everyone in travel is using right now, and most of it reads like a problem that happens to other people. You're not going to the overcrowded tourist traps. You're going to the real places, the good places. The ones worth the trip.
Here's what I see in real life: the real places are now the overcrowded places. The good places are the ones the travel blogs found three years ago. And July and August on the Spanish coast — Costa Brava, Mallorca, the Balearics — have become a specific kind of expensive frustration that no amount of pre-booking completely fixes.
The beach chairs are reserved. The "quiet" fishing village has a shuttle from the nearest town. The Michelin-recommended restaurant has a six-week waitlist and a 6 p.m. seating that nobody wanted. The 6 p.m. is technically available but you will eat next to a tour group debating what to do tomorrow.
This is not a complaint about Spain. Spain is extraordinary! It's a complaint about timing, and timing is something an advisor can actually fix.