Being young and no kids helps.
I did some similar things back in the 80's/90's, but I wouldn't want to do it now. My back couldn't handle it. Last year, I went to the Philippines with my wife, and traveled as the natives do once we got there. Took a old bus up thru the mountain passes to her family home in Cauayan Isabela. Glad I did it, but I won't be doing it again. Next time we go, I will spend a few hundred bucks and hire a car and driver.
oh god filipino buses are the worst. i took the cheapest one i could find from manila to legazpi in albay and found out those seats are not built for six-foot-one caucasians, and then southern luzon got slammed by a typhoon and the trip stretched from seven hours to thirteen after a couple of near misses on roads where, it turns out, dozens of people drowned from being washed into the sea when bridges collapsed and low ground flooded.
i caught a cheap cebu air flight back to manila a week later cause fug that.