Every time I'm about to draft I'm tempted to install the Vector works or Auto Cadd into my computer but never do. It's been 10 years since for me and the learning curve would be too hard. Plus I have this big expensive Hamelton drafting table proper. So I have a seat at it even if I'm not quite inking drawings anymore.
Drafting by
hand will be quicker for the quick sketch if you don't anticipate a lot of major changes to it. It won't be as flexable but will
beat the learning curve and memory killing.
By drafting, I learned in high school as a perspective architect but one of the more useful books for me on the theater has always been "Drafting for the Theater" by Dennis Dorn &
Mark Shandra. It has the
USITT guidelines on
line width and standards and a decent both design and drafting guide to it. In fact at least 10 years ago it was the only adiquate drafting specific
book on the market thus the only one for that purpose. Backstage Handbook has quick reference also to help.
On AutoCadd/theater there is Computer Scenographics by Payne and AutoCad Onstage by Rose - both are dated but get the
point across no matter what version. The avove Drafting also has a computer section so it's your best bet. The other two are better for Cadd only in learning it all.
Still, if you have drafting skill already, it's going to piss you off how inaccurat you have become, but it will probably still be faster that way if that rough
plot is your goal. In the long run if that's the intent, go AutoCadd or what ever version of it you decide upon such as AutoCadd Light if that's still sold. Once you get up to speed it's faster and easier on changes.