Having had a good number of Vanguard flights between Manchester and London in the 1960s ("Student" standby fare one way for under 23s was £2/10/6d) I would confirm a good number of the points raised. The vibration seemed to travel down the roof from front to rear in waves, particularly in the climb. At one stage, around 1963, there was a period when the engines were desynchronised at the top of climb and the aircraft seemed to hang in the air. The rear cabin was certainly the place to head for in the period of unallocated seats, unless moderate turbulence was on the menu.
As for noise on the ground, Vanguards taxying at Manchester were regularly heard in Heaton Moor, Stockport, around 6.5 miles as the Vanguard flew.