You will not be intimidated by the size of the parks at all...very self contained and not a ton of walking like WDW. They are not that spread out. They basically go in a big circle, very easy and is designed so you will not miss anything.
While I don't travel alone, my husband and I frequently split up. I have done the parks alone the pros are this:
1. Single rider - less wait time shorter line
2. I have met the nicest people and have had great laughs with complete strangers.
3. Love sitting at the bar at Finnigans, drinking margaritas and meeting people that are either solo travelers or so their seperate ways for the day.
4. Not having to hear whining from DH---"jaws again...MIB again...how many times can you ride the same ride" "We were ust here 4 months ago!" ( Can't help it --I'm a 40 y/o kid)
5. Eating whatever you want without someone reminding you of your "diet".
Relax and have a great time, you will love it. After a spin on the Mummy....you will be ready to go. Maybe we will see you there, we will be there again late August too!
Hope this helps you