My recommendation will be to do only very light exercise during 17-20June. For 23-26 June I recommend rest and eat.
If you have been training well a bit more rest will be the best thing you can do to help with success on your climbs.
If the climb gets pushed back a few days then you can just do some more Z1-2 runs. No ME. If it is pouched back a few weeks then you should go back to training and adding more ME is a good way to maintain that most important quality.