Wallee - On the pack stock I'll just keep the cubes and taco it in the bags it came in (and make sure the weed free tag is still attached to the bag - I was asked once by a back country ranger). Feed it and then burn the bag. The panniers or manties will keep everything dry.
If I'm going in with just riding animals I'll weigh the feed and keep it in baggies inside my nose bags and stash those in saddle bags. Since in this case I'd be taking a complete feed there's no tag required.
Stevenson - "I thought the cube and pellett bags had to state Weed Free. If not, how do your prove that is weed free? I have never seen it printed on bagged feed weed free"
- It does. There's a tag that will be on on the bags of cubes and some types of pellets that says it's weed free. You can see what the tag looks like here.
I've been asked and had to show the tags before. If I hadn't had the tags I could have been hit with a huge fine. Last time I checked for USFS the fine was $5,000 if you get caught.