Terance: Unfortunately for your relationship, you are right on the sleeping issue. Sleeping down at LP will pretty much wipe out any acclimation you develop by hiking high during the day. Perhaps your BAE has read of "Climb High- Sleep Low". N/A here: that is a Himalayan survival strategy for 19,000 feet and higher, not an alpine acclimation technique. In fact, you should not only sleep at the Portal, you should sleep at least one of those nights, preferably the last, at Horseshoe Meadows, around 10,000 ft.
More bad news: all that training you have been doing, and high elevation work: it is great for indicating how the body will respond at elevation, and it is getting you in basic condition, but it is not acclimating you for either wind or AMS resistance. Its a pretty good indication that you should not expect AMS up to 11,000 or so, but not in any way preparing you physically for that elevation or higher.
ANd finally. More bad news: Heights. There is really no place on the trail that is dangerously exposed, in my opinion, because the trail is generally pretty wide but there are a few spots where it feels like it might be, and someone particularly sensitive to exposure may need some encouragement and support to cross. A couple of stretches on the switchers above and below Trail Camp, and some of the window crossings between Trail Crest and the Summit can trigger fear of heights in some. Just so ya know.
Last, on food: don't count on anything you are not sure you will eat, and will pack easily digested calories. Jerky is yummy, but is it rally a fave? Not that big on digestibility or cals, so unless it is really your go-to, don't rely on it. If this is a day hike, no need to do anything special: what is good to bring up the mountain is something you know you will eat even if the appetite wanes, and provide ready energy: suck it up and carry the carbs.
Oh, and be prepared for reasonable hydration, but don't overdo it. Until trail Camp, there is water everywhere, so dont carry a lot (some don't carry any, or maybe a pint) except above Trail Camp: 3 liters each. And get plenty of salt with it.
