I really like this subject matter so I am finding it hard to be objective - however have never taken IR photos so bit in the dark re the process.
The last one is certainly very emotive - the first one I think I like the composition better than the IR treatment - I don't want those trees in the background to be almost white, they jump forward and over power the grave stones.
The second image is also a good composition from where I sit - somehow it seems so traditional, over arching tree framing the subject that I almost over looked it.
It would be interesting to do an IR shot and then a straight shot and then blend the two shots in photoshop, sort of keeping the IR parts that work and then letting the standard image shine through where the IR image is needing a bit of help to work. If that makes sense.
Mal