Hi Everyone, newbie here. I'm not much of a DIY guy but figured I'd take a stab at this one. I recently went on a road trip and noticed two things:

#1: The wheel pulls to the right constantly. This has been around for a while but is noticeably worse.
#2: At around 2300 RPM / 70MPH, the whole car vibrates cyclically. Like a resonant frequency or something. It comes and goes in about 10 seconds for a full cycle but just repeats.

I was going to drop it off at a mechanic but figured I'd ask around first. Thanks in advance!

Vibration could be wheel balance or a failed suspension/steering component such as control arm bushing, balljoint, or tie rod which could also contribute to the car pulling to the right.
Have your alignment guy look over the front and rear suspension.