I would not worry too much about weight or what bike you have. My rigid singlespeed 29er weighs 28lbs+ and I don't care as it is durable and comfey, these are much more important on long trips than weight or spec sheet

As my friend Joe, who is much more eloquent than me, said:

"Since this is a mountain biking forum, I can say with a lot of confidence that if you're reading this and you're wondering, "what would be the best bike for me to use to get started doing these kind of rides?", the answer is right now in your basement or your garage"

Alex