Any companies out there willing to hire someone that can't climb into a trailer?

I think this is the best path forward and I support you fully !
Whatever it is that keeps you from getting into the back of a trailer is surely limiting you in many other ways including decreasing your lifespan.
The older I get , the more important I realize health and fitness are

 

Well consider me Tom Brady cause I do it multiple times a day 5 days a week haha

 

Yea it's not that hard of a task unless you are not in halfway decent shape.

 

There are other abilities, but all of them are important. Including lifting yourself up into the trailer.

And, really, if you can climb up into the cab you should be able to climb into the trailer.
Left door shut so you can use that as a handhold, the DOT bumper has steps on the right side so you can step up.

And if you can't step up 12-15 inches...

 

With that said I do think a lot of people (shorter, larger, or any other minor disability) may have a problem. But a ladder should make it no problem. Or even just sweep it out at the dock if they aren’t nazis about letting you dispose of it there (or even letting you on the dock)

 

I have a strap right inside the trailer and mostly use arm strength to get in and out since my knees are bad, although I can manage without it, very carefully using the door the same way. Only have 1 door open if you need to enter the trailer so you can pull yourself up with the other.

So, while it's a common company requirement to be able to enter a trailer, it's far from being something that will make the job impossible. Especially since the ADA wouldn't allow a company to refuse hiring somebody that was rruely disabled and thus unable to climb into a trailer without using other equipment like a ladder.

 

Pull a tanker.

 

But you gotta climb on top sometimes, no?
But in that vein, perhaps bulk might be a good fit.

 

Mansfield Bar.