I'll still ride 'till sundown, even starting early. If the wife is with me, likely as not since I got the 'Wing, she starts poking me at about 500 miles. Fuel stops are at 130-160 miles. But I gotta limit the wife on coffee.
The magnesium does work. I have RA, and can sometimes get severe muscle/joint pains, so a couple of magnesium 400mg has about stopped that. The hip joints... not so much, but I have other goodies for that. I recently bought a Hartco seat, we used it on our recent trip to California, didn't like it... too much like a Corbin, somewhat hard for my liking so I'm gonna have the OEM seat modified. A good seat make all the difference in distance riding.