this is just what we were advised to do by our sanitation company as they really were not keen on running a special pickup for a single dumpster in the middle of a residential area
You should get a commercial dumpster. These have a slot in the front so you can slide it open and throw the manure in. We rent them here:https://dumpstersrent.com/DumpsterRental.php There are 2, 4, 6 and 8 yard dumpsters.
If you want to do roll off dumpsters (the ones where you throw them in the top) a latter might be your best bet combined with buckets.
Is your issue getting a top of it or transportation of mass amounts of stuff?
You could get a bucket and wheelbarrow if it’s a mass amounts of stuff issue.
A mounting block ? Lift and dump. https://redgorillausa.com/collections/flexible-gorilla-tubs
Or similar.