Another option is to use the brunch as a break in your MK day- our brunch reservation was at 12:30pm, so if you went to MK at 9am, you could walk or monorail over to CG for brunch on a midday break. I know some people don't like to leave parks in the middle of the day, but for us we always need a break!
This is what we are doing in February. We have a 12:50 reservation and will be hitting MK at ropedrop, getting a bunch done, then getting brunch. We'll then probably go take a nap before returning to MK later... or skipping it all together and just going to CG for the fireworks. My husband would love that and I can get a cheese plate in the lounge!