Argh! listen to
ME!!!!
I had this EXACT same problem with my mom's wagon. Just replace the strut/spring, AND the tires, and you'll be golden. It is not your alignment, it's not your bearings, it's not your ash tray...
you replace the springs and struts because they no longer dampen vibrations. You replace the tires because you will still feel the shake (even with good struts/springs) naturally because your tires are "wavy".
Trust me... I had this exact same problem. Replace the tires and struts/springs and you'll be golden. Wouldn't hurt to align at the same time, but that isn't the source of the problem.
And I highly recommend the yokohama avid touring tires for the 95LX. They're cheap, handle well in all conditions, and are super super quiet and smooth riding.