I would suggest while in DL, after the Matterhorn, grab FPs. Follow the parade route to the Fantasyland side of the Matterhorn, not because the wait there is shorter because it's the shortest walk and you will be in the line sooner. If you aren't right at the front of the rope drop, I would send someone to grab FPs see if they can work their way to the ropes. Grab a Star Tours FP then hurry up and catch up to the group at the Matterhorn. Then after the Matterhorn you should be able to get another FP and maybe another set of FPs before you hop to DCA.
Then going to DCA should be fine if you aren't hoping to ride things. Thinking of it as a bonus if you catch a ride with a short wait is a good thing to do. You may want to go back at night too, even to just walk around for an hour, to see the lights.
Skip DTD, you may want to eat there, but save the shopping for Saturday morning on Thursday when you aren't in the parks.
1. You may catch the Matterhorn soft opened ealier in the week, if you do you may want to rethink things. Since this is a big trip for you, you may not want to leave without riding the Matterhorn, RSR, LFT or MJJ. It could be regretful or of course it will make it exciting to come back.
2. Because it's a Friday after 5pm crowds will increase. If DL didn't seem too busy in the morning, which aside from the Matterhorn will probably be the case, it will be at night. Friday nights are very busy from after work crowds. This is why you will want to have some FPs saved from the morning. Crowds will drop a little after the fireworks end, and a little after the second F!. Really not noticeable until 11pm, though it's possible people will hop over from DCA.
3. Keep in mind because of the crowds hoping to get into the parks for new stuff the Security Lines will be crazy. 7am you should be on property to get through security and to the gates for Rope Drop.