Piers Diesel
I noticed you live in Marysville and wondered if you might have considered having Piers Diesel do the TST install?
I had his shop install mine about a month ago. After the Canadian exchange it wasn't that much to have someone do the install that knew exactly how to adjust it so that you have minimal smoke and yet still have the power you are looking for.
And the good news is that Piers himself will drive your rig and if he did like me, he even gave me about a half dozen tips and things to look for and consider. He knows so much about the Cummins it's hard for me to catch everything he said. But I felt the money was well spent. We took our trailer up, spent the weekend up in Canada and had a good time.
I can't say enough good things about Piers and his crew. I spent very little money there and yet they treated me better than the dealer did when I spent nearly $30K for the truck! Very nice folks, excellent technical, good installation.
Oh, I almost forgot. If you call up there, they might have their RVs spots ready to take customers - if not maybe you can talk Piers into letting you dry camp on his property.
Anyway, something to consider if you haven't already.
Bill in Gig Harbor