That is what carbon fiber tripods are for. I spent what was necessary to get a Gitzo after my 8lb tripod was too much for multiday trips up 4,000 feet of vert. It's now down to 2lbs.
Man, I would love a baby 1DX. Put the 1DX sensor in the body of a 7D (same AF, same FPS, same size and build quality) for less than $4k and I'd buy it in a heartbeat.
So would I! I'd love to get a camera like that â€“ especially as a landscape shooter who often is in the mountains. I would happily trade in some Megapixels for very good ISO performance (clean up to at least ISO 6400) because I quite often have to shoot handheld (sturdy tripods are wonderful when you don't have to carry them through the mountains) and under weather conditions where you don't want to set up your tripod first (wind, rain, snow). For the same reasons I would not want a body with lesser weather sealing than the 7D.