I have had all sorts of bikes, none of them very good, but only the heavy bike got me a helicopter ride, and it was only a dr650 with no luggage, not even a heavy bike by 650 standards.
If you took back roads, you can use a smaller bike to get places, or the wr250 will do the interstate, but I always hated wearing out good dirt tires on the street.
Power is nice to have and fun, low weight makes riding easier and more fun, but unless you go race bike, you don't get both. You can live without power, while a lot of weight can ruin your good time with broken bones, so if I was going to do anything rough and far I would trade power for lightness.
The new crf250 looks like fun...