For my RTV I have used 2 55 gal drums with removable lids and that worked but I could barely reach over the side to dump the buckets standing on the ground. My helper once forgot to take the lids off and that was a surprise dumping 4 gals of sap onto the lid. This year I'm upgrading to a tote with a small transfer bucket and Seaflo pump. I'm going to rig up a bracket for the receiver hitch to hold the bucket.
220 taps on tubing and Shurflo pumps, F600 4x4 Sap truck with 500 gal Bulk Tank, Leader Micro 2,
2x6 Smokey Lake Raised Flue oil conversion, Smokey Lake Short Stack with Air pump