Just back from a trip to the Czech Republic and having done Tempelhof only last week I can confirm that it is all very easy.
Have a look at the Flyer Forums, as someone said you can find a wealth of information about the planning we did. THere are some links on there with the information about the approach and departure routes.
If you get the Jeppesen chart the various reporting points are marked on there too.
Landing, handling, nav charges and parking for 4 nights was less than €100 for the Maule, not bad I thought for an international airport and the associated services. The Follow Me van will pick you and your luggage up and take you to the terminal.
If you are into history you can do worse than take a guided tour. I thought it was rather interesting.
Berlin itself is a beautiful city, vibrant and exciting.
I would go back in a heartbeat.
Have fun, and if you have any specific questions feel free to ask them!