Well I would put my money on the HAI Mi-26. It would haul your piddly little HEPAC 407, the HAC 350 and have room left over for several kegs of a foamy, cold, golden beverage, several cases of the highlands finest throat charmers, and room to stand and enjoy those wonderful beverages. 😀
I always thought the UAW R22 was a great weekend run about. Although small in size, it packs alot of small uneeded items for quick runs to the cottage or grandma's house.