I agree. The lowest headache version is Hilton O'Hare, which is connected to Terminals 1,2,3 by a tunnel and to Terminal 5 by an automated train. It's not a luxurious hotel, but it saves you the headaches of finding shuttles and waiting for shuttles.

After you clear customs and immigration, and exit into the landside area, look for signs for the automated people mover and/or train to T1, T2, T3. You'll take an escalator up one level to a very crowded platform and go 2 stops.

Exit at Terminal 2. Follow signs to Hilton Hotel. Super-easy.

There are multiple ways to get to the hotel, including street-level, by crossing car lanes and by underground walkways. So don't be discouraged if you see signs that point in different directions.

Happy travels.