Finally, somebody has got something. Nearly 2000 views on this post and no collaboration! I'll go if somebody else will. I can contact the media if we can get something going. Have you checked my bumper sticker designs at conservativeimage.com? Do you think any of those messages are good for posters? I can redesign any of them to poster format and upload them to my site quickly. You could then go to kinkos, have them download one and print it off on poster board for a professional look. That shouldn't cost much. I can make a Freeper design...
Conservativeimage.com, I think the following bumperstickers, from among your website, are the type of theme that would, IMHO, be appropriate for signs at the counter-protest:
"Bringing the troops home . . . " nice, maybe a little long?
"Who says they're not capable of democracy?" Very powerful.
"Supporting the troops means supporting the war." Well said.
Putting "www.FreeRepublic.com" in smaller font at the bottom of signs is a very good idea. Also, putting an American flag on the signs is something to consider, especially if you don't want to carry U.S. flags all the time. Still, it's a good idea to have some American flags to distinguish your group from the leftists.
Sometimes, I've taped a straw to the top of a sign and then taped a small U.S. flag on 6 to 10 inch sticks into the straw. From a distance, people will see that you're supporting the troops and the effort to win the war. The flag really stands out and people won't assume that you're on the leftists' side, as they might otherwise if they couldn't read your sign.
I'm pinging weldgophardline and trteamer to this as they conducted a FReep of Hillary in Denver in 2003. Maybe one or both of them would want to join you, provide pointers, or put you in touch with other FReepers who could attend?