I'll repeat what's been posted before on other threads (which you've probably already read). It's a lot more casual out west, and one of the things WDW travelers have noted is that the intense and long-range scheduling/planning that comes with WDW doesn't necessarily apply to the DLR.
That is, a DLR traveler should factor in free/flexible time to just roam around. It's probably a 15-20 minute brisk walk from SWGE (furthest north DL) to Radiator Springs (furthest south DCA).
I schedule my tentpole reservations (Blue Bayou/Fantasmic package, Lamp Light Lounge, Napa Rose if you're feeling fancy, character bfasts, etc... as far in advance as I can), and let the day take me wherever the lines are shortest (or wherever the MaxPass takes me)!
Aside from DLR, where else are you planning to go? Sounds like DLR takes up most of your trip (no objections here, haha)