I'm looking for a good bag to take to our agility trials. Something with lots of pockets, I think. Room for treats, water bottle, work papers (while we're waiting for our classes), leashes, poop bags, doggy coats in the winter, etc. Easily wiped down for trials in sand/dirt venues. Honestly, I'm thinking a diaper bag would be best but I haven't found a good one yet. What do you use? I've currently been using a reusable grocery bag, but it's ugly and lame.