My party went Saturday, we stayed at the Springhill Suites Convention Center and walked over around 12:30 via Harbor (with 3 teens, that was the earliest we could get them to roll out of bed and get going lolz), lines were nonexistent on Harbor security and not too long at the CA Adv entrance and moved fast. Springhill was a lovely place to stay, although the walk felt soooooo long when we went home the DtD way (we wanted Earl of Sandwich the night before, and on the way out we had beignets from the jazz kitchen). We put it on our short list of places we'd like to stay again when we run out of DVC points.
The park didn't feel too crowded, although we got there too late for same-day Lamplighter reservations which we periodically checked on. Mobile app food pick up times were all over the place, although our favorites tended to get later in the day return times sooner (for Smokejumpers and the Marketplace Golden Dreams). We'd spent our dining cards by about 3p, didn't spend much over them (one adult drink per adult plus another $5 or so for each of our two households).
I had difficulty with the DL app because once I clicked on the restaurant, no back button or "x" appeared to let me go to the home/main screen. My friend's iPhone had the app working just fine, so I figured it was a flaw with my new Pixel 4a's ability to interact with the DL app (I've only had it a month but I miss my Pixel 3A it seemed to have a lot less weird programming flaws .... prepandemic I'd used mobile ordering with my 3A). So every time I ordered something or looked at a menu, I had to close the app and start from scratch.
There was no line for the Legacy Passholder picture/pin/magnet when we got there around 4p. Games lines were short, but the kids didn't want to play they were content to just soak in the atmosphere. Original intention was to stay until 8p, but around 7p the breeze picked up and we started shivering since we hadn't brought jackets so we took our last sunset Photopass pix and left for DTD .... and boy was the line to get from ToD to DtD long! A lot of people gave up, and it took us about 20 minutes to get in which was what the CM at the front of the line had predicted, to me it looked like that line easily could have lasted much much longer (to find the end I thought we'd end up at the M&F Parking).
Only time we had difficulty finding seating was when we wanted to eat in Carsland/Pacific Wharf area around 3p. There were always empty tables every time we passed by Grizzly, which was our favorite place to enjoy our snacks for the atmosphere and because we liked being near the Grand Californian entrance. The only time we passed Boardwalk Pizza area there was plenty of empty tables there too.
Best foods were the ones people already mentioned, the Carbonara Mac & Cheese w Bacon and Strawberry Rose Lemonade were so good we ordered it at the beginning and everyone had an encore order of those two items again at the end of the day. Monte Cristo and Smores shake were also outstanding (we shared that half-portion and felt like half of the half was more than enough grease for the day). The teens also thought the Horchata Churro was outstanding, we were just bummed it didn't open until 2p because we'd planned on starting with satisfying our churro craving.
Oh, and I got my Watermelon Agua Fresca around 4:30p, it was weak and watery, and we were not impressed. My friend got hers at 6:30 and got a strong/much more watermelon-ey one, and thought it was pretty good. So drinks quality varied by when you picked them up apparently.
The handwashing stations around the park were a nice touch, but more often than not we ended up just using the wipes I carry in my purse for sticky hands, so was very glad I brought those. Also having a small folding umbrella for standing in line kept us from getting burned, so carrying those two things was well worth the baggage. (I'm one of those people that if I can get away with carrying nothing but a lanyard, I do, since I detest carrying bags in the park if I can avoid it).