Verb conjugation of "stammeln" in German

Since my wife is pregnant, we must postpone the trip until tomorrow. I am back again in Poland in June and then I would be very happy to meet you. I will email the exact dates a little later.
We can communicate via Skype if it acceptable to you. It's easier. I can also write you via regular email and attach photos. My hobbies are hunting and mountain climbing. The later is pretty dangerous.
There are great museums if you like art. The most important is the Van Gogh museum. There are good restaurants and bars in the center, it is very international. I hope we can stay in touch.