As already pointed out, it's way too far to bother attempting. However, I'd also like to point out that we are at the very infancy of our extrasolar planet search. I think it's very likely we will find much better candidates in the next decade. I suspect in 50 years no one will even remember Kepler 22b.
See here:
http://phl.upr.edu/projects/habitabl...atalog/results