Here is what we are doing in Arizona. I am making about a dozen signs on poster board and somewhat firmer board. Mambo magic markers to write with and I divide the number of inches across the poster by the number of letters and mark it with pencil so that I can plan the placement of letter. Some will be handheld, others will have 1x2 inch lath stapled to them (long staples and lots of them).
But for my big project I am going to Kinkos. for just $3 they can blow up your 8.5x11 into 30-ish by 40-ish if you want to go that big. Then use a can of 3M spray contact cement to apply to your $2 (or $3) foam board. Black and white only. color is ten times the cost.
I am doing a cartoon that shows a MMMer followed by a big guy with a "Police State" arm band to the rear who says, "Keep protesting. We're 100% behind you."
Another one is the photo of Elian staring down the barrel of an MP5, only the heads of the stormtroopers are replaced with Clinton and Castro.
Then the last one is all text. It goes, "If you believe that 500,000 criminals were denied access to guns by the Brady Check...
"Then you believe 20,000,000 addicts were denied drugs by the DEA."
Don't forget to use white shoe polish (the bottle applicator type) to write on your windows.
Part of this is to meet and activiate other gunnies. Part is to pump up moral. The rest is all fun.
Rick