Yeah, it is regrettable. But I do feel a lot more confident having towed it 500 miles so far, equal to about half the distance of my trip to NM. So I have some idea what to expect. I did avoid the one huge downhill on the 101 freeway, so giant mountain sized downhill grades will have to be taken extremely cautiously until I get a sense what I'm up against. And yeah, I was amazed at how people just get annoyed by a slow moving vehicle in the slow lane, doing really unsafe things to get around me, not stopping to think that maybe I'm in the slow lane going slow because I have a large load and want to be safe!! I did find I had to be 100% attentive 100% of the time towing this rig. I am leaving 7 days for the trip so I will not feel hurried and can take time consuming detours or sit out less than ideal conditions.
But overall, I'm much more excited than concerned. Taking it slow and easy I don't think I'll have problems based on my experience so far.
Just remember "safety third!", or wait, that's just for burning man, "Safety first!!" is what I meant.