Unfortunately, they are only offering Electrical Parade and Fantasmic on the same night when we are going to be there.
We would really like to see the Electrical Parade which is at 8:45 at DCA.
DL will have Fantasmic at 9 and 10:30p.
Is there any point in trying to make it to the 10:30 show of Fantasmic after seeing the Electrical Parade?
Yes, and you should also try to see the 9:25 DL fireworks! 
Watching the 8:45 DEP (Disney’s Electrical Parade) and the 10:30 Fantasmic is the first and third part of the “ultimate
Disneyland entertainment trifecta.” (The second part is the 9:25 DL fireworks.)
Depending on the crowds you might be able to also see the DL fireworks!
Here is
DangerMouse’s recent post about the trifecta:
"Well, since you asked …
You may want to grab some
and a cup o'
because this won't be short.
What we're talking about here is the ultimate Disneyland entertainment trifecta. It's not for the weak at heart, and definitely takes some strategic planning, agility in maneuvering through crowds and most importantly the will to make it happen!
To start with, you want to catch the DEP in DCA down by the pier area. You can stake out a spot very easily down there 20 minutes prior to show time. You want to be on the same side as the Mulholland Madness and Golden Dreams Theater. I like to sit somewhere in between the two. Once I see the last float coming toward me (Salute to America), I stand up and walk with purpose (long legs and agility help here) toward Golden Dreams, hang a left past the restrooms and then turn right to take the GRR back trail towards Condor Flats area. [If you look at a DCA map, you will see that this is very straightforward. You turn left at Golden Dreams, and walk past GRR and Soarin’, then exit DCA.] If you have moved swiftly enough, you will beat the front of the DEP to Sunshine Plaza and be able to head out of DCA while the rest of the crowds are still watching the DEP.
Walk (work your way) across the esplanade and find the shortest line into DL with the swiftest looking CM ticket scanner. Once inside you will have a decision to make. How are the crowds? Is Main Street completely jam packed? You probably have about 5 minutes (if that) to find yourself a spot to sit for the DL fireworks.
OPTION 1: If Main Street is ultra crowded, you can choose to watch the DL fireworks from the Train Station. I like to just stand up on the first platform. If you choose to watch the DL fireworks from this location, you need to understand that you will miss out on some of the special effects that can be seen from the Hub area, but to me, it's a fair exchange for accomplishing the great trifecta! Once the 9:25 DL fireworks show is over, you can jump on the train to New Orleans Square (1st stop). You should be able to pretty easily find a good spot for the 10:30 Fantasmic show.
OPTION 2: If you find that you have a few more than 5 minutes prior to the DL fireworks and Main Street looks manageable, you can try to make your way toward the Hub, with the goal of getting yourself somewhere close to the left side of the Hub (facing the castle) near the Frontierland entrance. Crowd control will have you moving around the hub in a counter-clockwise motion, so if crowds are bad, you may be watching the fireworks while you are walking -- not fun. However, you may at this point choose to just plant yourselves somewhere on Main Street to watch the rest of the show. You will have at least 40 minutes to get yourselves to New Orleans Square to watch Fantasmic after, so this can be done.
Many people think this plan is risky and unadvisable, especially for those who have not experienced these shows before, and I agree. If you have the option to do these shows on different nights, then by all means, you should. I prefer to think of "the ultimate entertainment trifecta" as a challenge and fun to do if you have seen all three shows before.
Have fun and please post (and gloat) if you are able to accomplish the trifecta!
"
If you can get to the hub (in front of the Frontierland entrance), here is some more advice from one of
HydroGuy’s previous posts:
"... it is not very hard to see the 10:30 Fantasmic showing. We saw the DL fireworks in the hub from over in front of the Frontierland entrance (on the left side of the hub as you face the castle). After the fireworks end you just head through Frontierland. One thing of which to be aware is that DL usually sets up a traffic management system in the hub before the fireworks start. This system in my experience directs everyone counter-clockwise around the hub in a one-way traffic lane. After the fireworks they try to keep this going for awhile and hence if you are too far away from the Frontierland entrance you might have to go against one-way traffic to get there which might be difficult. My advice is before the fireworks start ask one of the CMs who directs traffic in the hub where you should be in order to make it to Frontierland and Fantasmic and go with that."
.
We'll be on the Repo, too! 
). DD6 has often closed the parks at WDW! 
I bet some of the other folks visiting DL after the Repo cruise would be interested too! We've already made dinner plans with Ariel that evening (around 6pm, I think) but I'll go post the suggestion over on our Cruise Meet Thread. 
When I found out it was there, it became a must do.
