Boy does this bring back memories! Back in the day, think 386 and Chief V3. (Not X3 the one that came after 2, you know 3) I had the pleasure of using Chief on a Pen/Tablet.. I setup a tripod with a plywood tray and measured my As-Built's with this. It worked great, other than I could never figure out a good solution to do dimensions and text without a keyboard. I even tried Dragon Speech to Text. No go.
Over the years, I've tried pen tablets. They work great but for me I can draw a lot faster with a mouse. It is much more intuitive and it takes a lot less Arm and Hand movement that a pad and stylus. And to do text and Dimensions I still have to go to the keyboard.
I've tried touch screens with a finger and gave up after a couple of minutes. If you can get a stylus it may work okay.
Give it a try. i'd love to hear if you have better luck than I did with non mouse technology
Dan