I liked the spread axle reefers, with the lift axle, but I've always preferred the tandems best, and one with an air slide.
If you are going to be hauling a lot of different loads, the tandem is better, but if you have a lot of partial loads, you can load the spreads tail heavy.
You want that produce shoot, and watch when you have tall double stack pallets, that they don't snag and tear the shoot.
Lots of reefer loads are stacked high, and you have to break them down, when you unload.
I always liked the ThermoKing best and Great Dane trailers. You need one that can hold -10, even in the summer or you won't get to haul ice cream, pies, etc.
I've never had to use logistic posts on a reefer load. The palletized product is wrapped in shrink wrap, and you stack your pallets 2 wide, alternating each pair to the wall opposite the last pair.
Then you use load locks. I like to use 2 even on short stacks.
The floor is ribbed aluminum, and also the side panels up a foot or so, and if you haul any meat, you have to power wash the trailer out, after every load.
When I'd haul produce that got the floor messy, sometimes I'd throw the reefer on freeze. It would make sweeping the spills out easier.
When I'd get the gook caught at the tail of the trailer, I'd use a Flying J or a Pilot rewards card to scrape the crap out.