When do Tours become available for booking?

Can I assume that the 2025 dates will be released sometime this fall?

No

Usually around June for the following year. But the timing/dates changes little, if at all, from year to year

I had that question as well. Is there any email notifications that I can sign up for to notify me when the 2025 tour information will be released?

Availability seems to be first reported by observant folks here on the forum. Sometimes the early tour dates (Feb-May) are released before the whole schedule.

Sign up for tour news. They will send an email when tours are available.

I just noticed that when you look up 2024 tours, the RS website says "Looking for 2025 departures? Check back in April!"