Is Eurail our best option?

1. You’re very early to plan your journey. No single timetable for 2024 has been published yet. From Octobre 2023, they will gradually start to appear. Some countries (like Spain, France, only publish timetables a couple of months before. France usually 4 months, Spain and Italy 2 months, sometimes less.
   The big timetable change is every year, on sunday around Decembre 10. (But usually timetables are quite similar as the year before. Pick a date somewhere next week, to see what you can expect train connection wise). You best make your seat reservations 2-3 months in advance.
2. When crossing 3 countries or more with quite long distances (which seems to be the case for your group), Eurail is in 95% of the cases very good value. Especially if you value flexibility.
3. There are a lot of tips and tricks we can give to minimise reservation cost. Some trains have an extortionate reservation fee (like Thalys, TGV Lyria, but these are quite easy to avoid). Anything more than +/- 10 EUR per seat reservation is a lot and you should ask here for alternatives.
4. You’re not travelling in high season, there will be plenty of availability. Trains have huge capacity and are in general very frequent. Only for Thalys (soon Eurostar red, high speed between Amsterdam-Brussels-Paris) this might be a bit limited, but these trains are very easy to avoid by travelling via slightly slower trains and the TGV from Lille.
5. If you book al your seat reservations together, you’ll be seating together, or at least close together. There are seats in bays of 4 and per 2 (in 2nd class). In 1st you have solo seats, two seats next to each other, bays of 2 or bays of 4. On most long distance train you’ll have a bar or restaurant to come together as a group.

As you still have plenty of time to plan, please familiarise yourself with Europe’s rail system via this website:

https://www.seat61.com/european-train-travel.htm

https://www.seat61.com/how-to-use-a-eurail-pass.htm

And the country specific pages on the website of the man in seat 61 (The Netherlands, Belgium, France, Switzerland, Italy).