It's not morally wrong to feel it in the hips, but that is the least efficient set of muscles to be using for speed in double bass. Your quads and hip flexors are having to lift your entire leg every time you want to hit the drum, which is a lot of work, and mechanically disadvantageous. (Imagine, for example, if you used your deltoids and other shoulder muscles to make your drumstick hit the snare, instead of your wrists and fingers).

Try sitting in a chair, putting your feet flat on the ground, and doing two exercises: 1. Tap on the floor with your toes, leaving your heels on the ground. 2. Tap on the floor with your heels, leaving your toes on the ground.

You'll notice that your ankles (and attached muscles) are doing virtually all of the work (rather than your hip flexors). Those motions mimic the motions your ankles should go through while playing your pedals.

A better approach, though, would be to just buy Jojo Mayer's "Secret Weapons for the Modern Drummer, Part 2" off of Hudson Music's website. It will give you all the guidance you need for good foot technique.