Flyers are alright but only if your physically putting them in the hand of someone, not posting them in places hoping people will see them. I agree with above, signs are what will get attention, simple signs with very few large words in key locations throuout troy preferably along 109 and 24/27 best places are at large intersections, in front of eldorado, mtn market, maybe those gas stations where river rd intersects with 24/27, and def in downtown troy somewhere.
The one that was in front of eldorado was about the right size but I mentioned to Cody today that next time make it fewer, larger words. Something clear and concise along the lines of "Mud/Rock Race at Uwharrie Stables Sat July 26th" in all solid black print would be ideal, and get those size signs out at the most locations you can.
For instance on the way back home today I went 109 down to 24/27 over to 52 to 152 (I know not the quickest way but I like going that way) and along the way were the large banner type signs at intersections of larger roads/highways for a concord ultimate cage fighting type style event. Those were perfect because there were very few words, they were large and one solid color, quick simple easy to read message.
That will get the spectators in, the next step is to get the competitors in, and theres your problem, yea we have here on nc4x4 but there really isn't a large scale way to reach wheelers that I know of . . . . from past experience forums really aren't a good way to soley rely on for advertisement to the competitors, yea we should still get it posted up wherever we can, but the problem there is your hitting like 25% actual competitors 75% web wheelers.
But the problem with generic advertisements like radio and print are that they are expensive and its very hit or miss with your target audience. I think best bet would to be the signs mentioned above, forum posting, and then simply getting on the phone and making phone calls to people you know that are competitors asking them if they want to come and to mention it to others, it seems word of mouth . . . especially coming from the mouth of the organization putting it on, or a previous competitor, works the very best for getting the actual competitors in. Ie: contact the same pro mud guys that came, ask them who they know that you could call, maybe get in contact with the person in charge of the lee county motorsport complex over in sanfrd and talk to him, as long as your events don't collide schedule wise I don't see why he wouldn't be down with spreading the word to the people that compete over there.
Maybe get in contact with the people who run mooresville dragstrip, from personal experience there are alot of gearheads n rednecks that go over there for test and tune thursdays, be a great avenue for advertisement.
Also that place you guys mentioned that does the ATV drags over that way can't remember the name, over at galloways as well, maybe wherever it is that Cody does the truck pulls, any motorsport type venue.
And I'm sure others can come up with ideas of similar places to call/ask if signs can be put up as well. Main thing to consider is your target audience and where it will get hit the best.
thats my 2 cent, I just finished going to school for this bidness related junk