I agree w Guy. I also don't throw them because I have never seen a positive reaction from a customer picking them up as they immediately take them over to their trash can, without even looking at them. About 8 years ago I advertised in a local weekly newspaper that is thrown out to every home once a week. One of those local community newspapers. I did very well off the advertising in it. I even remember seeing customers picking them up in the driveway and taking them into the house to read them. I stopped advertsing in it about 5 years ago as it just wasn't paying for itself.
Now 8 years later, I see some of the same customers homes and that same newspaper is sitting in the driveway or yard water logged and sometimes their is 2-3 weeks worth of them lying there. Or I will see them pick them up and take then to the garbage can with out even looking at them. WHY?? Because that same newspaper is available on line.
Spend the money your going to spend on Rock Flyer's, Bags, and Rocks...and create a Good Quality Web Site...(call me if you need some help w that) Get a great looking Business Card and hand it to everyone you see. Get good truck signage that easily communicates what you do and how to get a hold of you. A wrap is great...as long as your info doesn't get lost in the wrap. To often times I see a great looking wrap, and after they have passed me by, I think, Ok what is that they do again. Most people today are taking pics' of truck signage and then calling, so make sure what you do and the phone # stand out, and are easy to read.
There are many that have had success w Rock Bags and many that have not. You just have to decide what's best to spend your resources on, and by resources I mean time, energy, AND MONEY.
Hope that helps.