no don't take the bumper off. You can remove the headlight housing if you must. there are bolts under the housing that must be taken out plus what you see from the top, but it is not necessary. Be careful of the clip that holds tension on the bulb. It is sprung into small brackets that allow the clip to be removed, which I do, and that makes the job easier for me. If you accidentally spring that clip out of it's position you must then try to hunt it to where ever it has fallen. Start the job with plenty of time and a good attitude and you can get it done. Might try the search box for more detailed info.
Enjoy the ride!

You can find a step by step instruction pdf in the TBS and how to section; Look for index of Crossfire problems and repairs, then go to the lighting section.