If it can be moved enough to get it off the road, it can be moved enough to get it on a lowboy. Over height/permit issues are the towing company's problem, and it's most certainly not their first rodeo. Most likely there is an exemption for "emergency" tows. Let them worry about it.
Portland Heavy Towing is the first result in google. I would start there.
They may be able to block and chain the axle and frame well enough to get the trailer where it needs to go without loading it.
It's been a couple of days. Certainly this trailer is not still sitting on the side of the road?
