Oh youll be amazed at how much you will be able to do solo. Without having kids to wait for, to be worried about, dealing with attitudes, food/ bathroom breaks, and all the worries that come with kids.... youll be far head in the game. Moving through the crowds will be easier and faster. Besides using single rider lines, youll get asked to fill in open spaces in ride cars so you may jump ahead of others when picked. You can choose your own specific plan doing only the things that you want. Fireworks, parades, shows... its easier to find a watching spot for only 1 than many.
If you dont have ADR's dont worry so much. Theres some excellent counter service spots that serve great food items, lots of snacking items to be picked up in the parks as well to fill you up. Look through the dining posts and choose what youll order from CS ahead of time, make your plans each day where you want to stop in, eat at the off hours to avoid crowds, so that will save you time as well. If you do desire a TS, you may walk up and be there at the right time to find an available table, just ask the CM host.
Solos are great once you get past the being on your own feelings. Enjoy.