I've heard that the Howard Johnson is pretty good. Friend of mine from Brissy stayed there last year and she enjoyed it. For closeness most of the hotels on that strip on Harbor Blvd are within "walking" distance. At least being on your own you're not worrying about others keeping up and complaining.
We've stayed at the Fairfield Inn, it's nice and OK. My parents stay at the Carousel, they're nearly regulars, but they say it's gone downhill of late, but it's still nice.
Our preference is the Anabella. It's newish, rooms are quite nice, and it's a 4 star. A main reason we stay there is it was really the only place within striking distance that has a hot breakfast. Now the downside is that it's at the back behind DCA, but if you're there during a shoulder or high time, then the car park operates. What this means is you wander down the road and there is a back entrance from Katella into the car park and then you jump on the tram that takes you around to the entrance plaza. Very handy, especially at night.
But really you're on your own, there are 3 beautiful on-site hotels that are just calling your name. We've done 2 (DLH and PP) and they are just something special. And getting back at night is a breeze on the monorail or just a short stroll though DTD. So go on treat yourself!
I wouldn't worry too much about being on your own. I've never seen any sort of trouble there, and if you're walking back at night after the fireworks, there will generally be another couple of thousand doing the same thing, so if you just stick to the crowd, you'll be right. Just get talking to people and it will look like you're in a group anyway. (By the way as I type this, I am being serenaded with When you wish upon a star)
2023 Disneyland, Walt Disney World, Disney Cruise Lines - Disney Wish. Going to be awesome to be back!