I did about 700 miles on the Great Divide this summer using tubeless 2.2 tires. While the rims were not "tubeless ready" they worked fine. Still carried some tubes and a pump. On a recent day ride on a gravel bike, I sliced the sidewall on a 40mm tubeless tire. Used a spare tube and a park sidewall patch to get me home.
I think tubeless on fine for touring, but still need to carry a tube, pump and patch kit. It is very unlikely that you will be able to pop a tubeless bead back onto to the rim with a hand pump.