A "Schönes Wochenende" ticket is one that allows about 5 people (iirc) to travel for a fixed price (€40, or am I being old?

) on non-intercity trains for the entire weekend, more or less. So if you plan your route well in advance, and allow plenty of time and hope there are no delays, you could get to Hamburg for a fraction of the price, if you travel with enough other people. You also get to see places (OK, stations) that you would never otherwise see.
Maybe you could find some nice Union fans who also speak English and would let you go along...