I find hot brakes to be a distinctive smell, not easily confused with hot rubber. But if your nose is less discriminating, and smelling close to each wheel and feeling the radiated heat from the brakes (don't touch!) doesn't find it for you, you s/b be able to easily check for dragging brakes by lifting with a jack and checking for free spinning of each wheel.
If the vibration and smell are unrelated, the vibe could be as simple as a thrown wheel weight. Bad CV joints can also give vibes, particularly starting at speeds in the upper 30's (mph).
If the vibration and smell are unrelated, the vibe could be as simple as a thrown wheel weight. Bad CV joints can also give vibes, particularly starting at speeds in the upper 30's (mph).