Now I'm nervous....I was seriously planing on stop for each and every character.
Will I be swept because of that?
tbh idk how I will even be able to manage a potty break much less photos. I'm pretty much determined to take a selfie in front of the castle and make a bathroom break in the parks (porta potties are yuck!) and that's about it and even THAT seems like a time crunch. I'm hoping I can really improve my speed over the next 2 months though, so fingers crossed!
In terms of stops ... it depends on a lot of things, including when you start, your pace, and lines (for both characters and restrooms).
If you're worried, try to get to the corrals early so that you can be towards the front of your corral - that'll give you an extra minute or two, which may not be much, but if you're in the last corral and your average pace (including stops) is 16:05, this minute saves you from being swept.
The most important thing is to monitor your pace. If you have a Garmin, check your pace every so often (if you're using your Garmin to check overall pace including stops, make sure "Auto Pause" is off - if it's on, it may pause when you're waiting in line). If you're faster than 16:00, you're fine. If you're slower than 16:00, you may want to hustle a bit. Your pace probably won't be 100% accurate unless you run all the tangents, but at least it gives you some idea of how you're doing and if you have time for stop.
If you don't have a Garmin, use an app on your phone (I use MapMyRun, but others use Runkeeper ... there are a million apps out there, but again, make sure "Auto Pause" is off).
If you don't have a smartphone (or won't have it on you), I'd recommend getting a cheap watch with a stopwatch (if you don't already have one and are okay running with a watch) to help you keep track of how long you've been out there, and either be good with math in your head or have a printout of what the mile markers should be for a 3:30 half or 7:00 marathon (aka 16 min/mile).
Basically, the more aware you are of your pacing, the easier it will be to make an informed decision about whether or not you have time to stop.