Just be aware, as busy as ETI is, if you go visit the only time you can get out on the manufacturing floor is during their lunch break. Noon to 12:30. However, all the trailers on the lot are open for inspection and there's a TON to look at. Just remember to clean your shoes well and have clean hands.
Also, if the weather is good and all the exterior doors are open you can peek into manufacturing that way. That's how I got to see Alf's trailer before he did!
In April, Vicki A. and I went up to ETI. Spent the night at the Best Western and were at ETI when they opened the next morning. Toured everything we could, asked a ton of questions, each made decisions, made the big payments and left about 1:30pm heading back to Portland. Quick trip and absolutely priceless.