realistically, if your mattress has no seams or creases at all, just a solid block of foam, all you need to worry about treating is the frame and the sheets, and the box spring if you have one.

instead of glue traps, which would work, of course, you might consider the kind that's a cup-inside-a-cup that the feet of your bed sit in. something like this: https://www.amazon.com/Bed-Bug-Interceptors-Interceptor-Pesticides/dp/B07SPDXVMM/

simply because you might accidentally drag your bed sheets over the glue, or step in it, or a curious pet or child might encounter it.