While wandering around the primeval forest outside the strict reserve, be careful not to cross the border with Belarus or you might be in for trouble. Some stretches of the border look just like an ordinary path so better check on the map. Have your passport on you, just in case, and don't carry anything of value or it might be legally taken away from you by the Belarussian authorities if you are caught trespassing on their territory.
Update: I have just read that, now that this border is also that of the European Union, a fence has been constructed in the forest to prevent people from crossing to the other side. It keeps intruders at bay but is a problem for the bisons which cannot move freely in search of new pastures in case they run out of food.
When traveling it is important to comply with general rules.
So, while in Bialowieza make sure you are drinking the right beer.
ZUBER beer is one of your choices.
Please, make sure to be extra careful. You don't wan to be caught with let say.... a budwaiser.... That would be a shame!
If you're travelling by car on the Catholic holiday of Corpus Christi, be prepared to come across numerous processions in little villages and towns as well as in the streets of big cities. They may be taking place at various times of the day so you never know! Just relax and wait, get out of the car to strech your bones, theres not much point in expressing to the local people how upset you are, it's an old tradition that is respected by everybody in the country. Forget about complaining to the policemen by the road - they are there to make sure that the processions can go safely and undisturbed by traffic.
We started the trip exactly on the Coprus Christi day and we came across three processions. One of them in a little village kept us waiting for about half an hour!
Corpus Christi always falls on a Thursday and that's how we're getting a long weekend because most offices close for the Friday after. But the Thursday varies from year to year - it is roughly about 60 days after Easter. It usually falls some time around the middle of June... or if Easter is early, Corpus Christi is at the end of May.
In 2004 Easter falls on April 11, and Corpus Christi will be on June 10.