Good news, I think. The order status on the 160Ah Victron LFP battery kept showing as "processing", so I contacted Northern Arizona Wind & Sun to see if there was a delay, or if the battery was no longer available. Looks like it arrived at a friend's shop on Monday, so I may have one of the last of that capacity that's available. I should be able to pick it up tomorrow.
I haven't had a day off in a few weeks, so I haven't made any progress on a detailed schematic. With a trip planned in a month and I plan to pick up a 330W panel then, meaning I won't have it available for use. With the battery on hand, I'm going to do a partial installation with a 100W panel and a Victron charge controller, which should provide enough power to get the battery through a four day backpacking trip while I'm away from the truck at the Grand Canyon. I'll probably wait to install the alternator charging side until I have time to do it right, and test everything before hitting the road.