Small update - went on a quick weekend trip with the new lithium batteries. We used as power as we could to give the battery a test - about 40Ah overnight. I noticed two things about the battery performance relative to the prior AGM battery
1. The batteries will accept the full power from my solar panels (about 9A this time of year) up until the charge controller decides they are full and shuts off. This is very different from the AGMs which would get to ~85% state of charge pretty quickly, then take another 4 hours or so to reach 100%.
2. You don't really get much charging from the alternator. I think the tacoma has a 'smart' ECU controlled alternator, which puts out 13.9V for a few minutes on start up but then quickly drops down to ~ 13.6V. With the solar panels going, 13.6V is actually lower than the house battery voltage, so the alternator does not really provide any charging current. Without solar, you do get a little charge current (~5A) but not much. So if you rely on alternator charging you would either need a DC-DC charger or figure out how to turn up the alternator voltage to ~14V.