Hello and welcome back to JustAnswer!
Not fun is it? Those back four are not fun. You don't have to remove the booster though, you just need the right combination of extensions. Here's how I do it.
I use a regular depth spark plug socket. After the coils are removed, drop the socket down the hole. Then drop in a 3" extension. Then drop in a 1" extension, push the extensions into the socket. Loosen the spark plug all they way with a ratchet. Once it's loose, pull the racthet up until you can grab the extension with one hand. Hold them with one hand, pull the ratchet off the extensions with the other. Then pull the extensions up, hold the 3" with one hand and remove the 1", pull it up again, hold the plug socket with one hand and remove the 3" from it with the other hand. Then you can bring the socket with the plug out of the hole. When you go back together put the plug in the socket, very gently let it go down into the hole. You don't want to bend the electrode. Once it's down, drop your 3" extension, then the 1", then you are ready for the ratchet.