I had the same dilemna for years and finally last year got a richway foam marker system which i put on the 60 gallon skid sprayer in my mule. Although expensive i couldnt be happier with the results,especially when spraying expensive herbicide like journey,etc. If you want to check/try mine out just shoot me a p.m. The sprayer specialties link which was posted above is a great source of anything spray related.At least one guy at the counter is an avid hunter, not to mention all the mounts that are displayed,which i was impressed with because alot of places "blow you off" when the figure out your not a real farmer and are trying to enhance your recreation property, also the in store prices are much lower than listed in the catolog or website. Maybe they will have a demo unit at the upcoming qdma food plot day,or i could bring mine out.The foamer was possibly some of the best money spent for my endeavors not to mention eliminating alot of frustrations!!!