Since you've had training interrupted, and (I think) not going for a PR, and doing the CtC (but not with Space Ghost), IMHO the mental strategy is break it up into manageable segments, for instance a series of 10Ks, and we know you can do a 10K.
For me, the first segment is Epcot to the MK, where I know that I'll get a short run break for a photo with Dopey, in front of the castle, and maybe one back stage on the way out of the MK. I know, it is actually more of a ten-miler, but I love that segment with (sometimes) a moon overhead, the monorails whooshing over and honking their horns, and then sunrise over the Contemporary and Space Mountain (I'm slow enough that that has been the case for me in the full).
Leaving the MK are the cool, mostly quiet miles going past the golf courses (and where you might be glad to have kept your outer layer with the cool air coming off those fairways) but once past the golfing you are more than halfway and only a 5K to AK. The run through AK is fun, especially with guests cheering us on, and goes by all too quickly, then comes the slog down Western Way and W Buena Vista to the BB parking lot. Those 3 miles (seems like more) are the longest, most boring miles for me. Maybe I should try streaming a TV show...
Once I come out of BB, I know I'm down to less than a 10K, and I know I can do a 10K, and this is where things get fun(er) again. I'm going past Coronado Springs, which means HS is coming up, and once we go up Chocolate Mountain and into HS, then things happen relatively quickly and I know the end is near. As fatigued as I am at that point, I really like those final 3.2 miles.
So that is how I mentally break it up into manageable chunks. YMMV
I'm also a big proponent of lying to myself and saying that I'm almost there....