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.
You know that feeling when you're leaning back on a stool and it starts to tip over? Well, that's how I feel all the time. -- Steven Wright