I recently bought a Catrike Dumont, knowing I would likely need a hitch and rack, or possibly a roofrack. I drive a 2013 Honda Accord, and the folded dimensions of the Dumont didn't look promising for the trunk. I thought possibly that it would fit with the front wheels removed, but still no go.
Hondas let you fold the rear seat down to accommodate long loads from the trunk, so on a whim I tried just going through the back door and setting the trike on the downfolded seat. It was very little trouble and fit fine. Note that the trike was folded, front wheels off, and boom collapsed. A minor benefit of removing the front wheels was a fair weight reduction as well.
I will be driving from Alabama up to Buffalo, NY, in July, and did not relish having the trike exposed to the weather and the possibilty of loss to a rear end collision, so I am very satisfied with this packing scheme.