The trip planner isn’t like that at all, I’m afraid. In fact it’s not very good for planning end to end trips. There is no real end to end journey planner, as such. You need to add a bit of human input.

The best place to start with European rail in general is the Seat61 website, www.seat61.com which has a lot of detailed information on how to get from A to B. It’s run by a guy who really knows his stuff, and he uses his own knowledge, rather than a database, to suggest journeys.

You can also use the German Railways website, www.bahn.com for timetable information. But don’t search for next summer - timetables won’t be there yet! Search for next week to give you an idea. And don’t expect it to pick the perfect route if that route involves 8 trains and 48 hours - it’s better on smaller chunks of journey.

You might also find this railway map useful: https://www.seat61.com/reference/interrail-and-eurail-map.pdf

THANKS. I was going nuts trying to plan nice day trips during our stay. I appreciate your help.

Seat61 also has a good page on the Eurail pass in general, including how to decide whether it makes sense for your trip, or whether you should consider a different pass, or just buy tickets.

In France and Spain there are reservation fees for most trains you will want to take, so that makes Eurail not so great in those two countries.

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

No problem.

Unfortunately, rail in Europe is nowhere near as simple as booking a flight. You need a bit of legwork and knowledge. But there are lots of knowledgeable people on this forum who will point you in the right direction, and the Seat61 website is an absolute goldmine.