No, I don't haul for a living, and yes, I plan to keep it simple. I have unloaded trailers by hand in my younger days, but as I get older, I tend towards technology to make the physical stuff easier. About 3 years ago I had to unload a utility trailer by hand and it took me a week to do it (Several reasons including weather related issues), so I decided a dump trailer would get it done quicker. And, it has, the load normally comes right out and I can make two runs in a day. This is the first one that didn't and I only got one run in. I ended up lowering the bed and climbing in. Once I broke out the crust it came out better but still not as good as usual. I plan to try cooking oil (biodegradable) first then go from there.
As to what the problem is - It's not a big problem, it's more "funny" because I bought this dump trailer to make it easier on me and I still ended up having to shovel a lot of it.
Yes, cardio is good and that's one reason I work outside with the garden and orchard and etc. I have a real hard time working out in a gym, just no interest.