I load on site all the time to work up and chrono loads. I don't have any use for the hand presses, I just unbolt one of my presses and a scale and dies and put it in a range bag.
At the range I bolt it or C-clamp it to a 2x8 or my truck or whatever is handy. If I think ahead I will have a bag of primed brass. If I were there for a week I might take a powder measure along.
It's as functional as my bench setup.
