A tablet would be better... but if I'm going to lug a tablet around, my Macbook is better yet, since it's not that much bigger than a tablet and has a keyboard.
I did exactly this for a while as an on-call admin, and found the iPad to be a better fit. It was slimmer and easier to pack, if only by degrees, and if I couldn't use a keyboard because of the location - like literally standing in the foyer of a Broadway play house fixing a problem before heading in to see the show - I could at least peck at the on-screen keys with my thumbs while holding the iPad. Of course, ymmv, but for remote work, the iPad was the better option for me.
"Would I turn on the gas if my pal Mugsy were in there?" "You might, rabbit, you might!" -- Looney Tunes, Bugs and Thugs (1954, Friz Freleng)