Reminder: it’s not so very long ago that English Heritage planned to leave a time capsule in Silbury – one hell of a harebrain/totally-against-acceptable-conservation-practices if ever there was one (and a plan supported by some stoneheads who should have known a darn-site better). That plan by English Heritage was effectively stopped by a letter from Lord Avebury to the press, not to mention the unwavering action of some here and several long debates on these pages (scroll back a couple of years to find them).
So ask not what I would do (I’ve spent 50 goddam years of my life saving a bit of the world’s heritage and deserve a break :-) ask yourself what you and your generation (if it’s a younger one) will do. Thankfully there are some younger voices of sanity even on this short thread so not all is lost.