Slope - really hard to judge!
No necessarily so, see my earlier comments.
Once you are happy landing on a slope you will be amazed how quickly you stop even if it is not into wind
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There are some good thoughts on this thread but quite a few seem to amount to trotting out the same old "stuff" taught at PPL - its OK as far as it goes, but I think as I said earlier there is a bit more too this, and with only a little effort we can all improve our chances of success greatly - then again it might never happen or you might have a handle to pull on.