I have a kennel set up at the lake for my dog. Last year it worked fine just in the grass, but this year it's already wore down to dirt. I know concreting it would be best, but it doesn't look like that's going to be possible this year. Any suggestions on other materials to use? I was thinking about just using #9 gravel with a weed barrier underneath, but someone else reccomended a course mulch. Thanks!