A tilt-shift lens is usable for a short trip, but the two movements have different learning curves.

Shift is generally quick to learn and very useful for architecture, especially for controlling perspective. Tilt takes more practice, because it changes the focus plane and requires understanding the basic theory behind it. The “miniature” look is possible, but it demands accurate manual focus and your margin for error is small.

If you’re new to manual focus, one week of total use may feel rushed. A better plan is to rent or borrow the lens before the trip and shoot with it constantly for at least several days beforehand. Learn how to unlock and orient the tilt/shift axes, and practice focusing with the exact camera body you’ll use.

Helpful tools: Live View if your camera has it, a suitable focusing screen if your camera accepts one, and ideally a tripod.

So: yes, you can accomplish useful work quickly with shift, but tilt is less intuitive. If the trip is important and you can’t practice first, a standard ultra-wide zoom is the safer choice. If you can prepare in advance, the tilt-shift offers unique creative and architectural advantages.