I might be alone in this opinion, but I don't think the messy trailer is a big deal (other than safety-wise, making sure things weren't loose enough to bounce out along the way).
It's clear this trailer is not their entire move -- presumably there would have been a large moving truck with all their furniture, kitchen items, clothing, tools, wall art, girls' belongings, etc.
Not to mention their multiple vehicles. I wonder if they made more than one trip to move everything. Or had to hire out the hauling of extra vehicles since they could each only drive one at a time.
It looks to me like the "extra" space in and around the Bobcat was filled with "guy stuff", maybe from BM's "man cave" or workshop or even a landscaping office if there was one.
Especially if their quantity of regular household stuff was enough that including this extra stuff would have bumped them up to needing a larger size moving truck, I can understand wanting to take advantage of the space already available on the Bobcat trailer.
I would like to see what was carried in the bed of the truck on that trip -- maybe landscaping hand tools? He certainly would have had chainsaw, wheelbarrow(s) etc. Lots more than just the trusty Bobcat...
The awkward inclusion of the gun safe makes me think that the items on the trailer were things BM didn't want the movers touching/seeing...
MOO JMO