In reply to glilje:
hey there, I think my site https://www.climbcation.com might be able to help you. I built it to give people ideas on world class climbing destinations to check out based on their filters. You could go in there, choose "trad" and "sport" as the climbing types, Oct to Oct as the months, check "Solo Friendly", and then move the map over to europe to filter to that part of the world. You could also pick a grade filter as well to make sure you aren't sent to a crag that has particularly harder climbing(for example, I wouldn't really go to rodellar unless I was climbing at least 7a).
As for a personal suggestion, I think geyikbayiri would be a great spot. The climbing is incredible, it's super easy to find partners if you stay at josito or climbers garden, the food is the best in the world(opinion), and it's dirt cheap.
Post edited at 14:50