The following presumes none of the previously mentioned in-game factors (wear, fuel) and metagame concerns (the GM will automatically screw you as soon as possible merely on principle) are present.
To a large degree, the answer depends on where you're going, what your supply situation is like, what the local threats are and where they are located, and so on. By summer 2000, captured vehicles were common so that's less of an issue, or rather, it's something so common different forces have experience in dealing with this problem.
If you have a short distance to go and are sneaking through enemy lines, then traveling by foot is sufficient. In a couple days you're going to be safe and can hypothetically resupply.
If you have a significant distance to travel, then vehicle travel is probably worth the risk. Assuming the idea is to make a run for Krakow in as few bounds as possible, then pursue some means of future sustenance, a vehicle allows for more flexibility in future operations. A large vehicle like the BTR can serve as a mobile base of operations, provide fire support, is a means to move salvage, etc.
Tony
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