Since the shirt and hat orders are placed and I believe already being sent out to those that ordered them (wasn't paying close attention since I didn't order this time). Another thing is just to yell WISH. I've done 2 races without a WISH shirt. I spotted the shirts in the race and just ran/walked up and said Hi and introduced myself.
One time comes to mind at WDW's half that I yelled WISH WISH WISH at Carrie, Scott and Cam. Funny look from Carrie for a split second that cracked me up then and still does when I think back. Expect a split second delay as the person is trying to mentally place your face but then the screaming starts even louder
You might spot my Mom and other's family members on the course in WISH shirts who won't know many people. My DH came down 1 year and had a nasty allergy attack, frankly I thought he was sick but anyways he had to be the most miserible screamer out there

But he was there, and it was wonderful but sometimes we don't know what is going on with those that are screaming. So if you encounter a quiet one don't take it personally. It might be they are sick, might be caught off guard or took a bit to react.
This past Jan's half I encountered WISH shirt after WISH shirt while doing the race so I imagine you will find yourself around other team mates quite a bit
For families/friends and cheering they have a free email newsletter they do, look at the ChEAR Bronze Package. There is a free one that is the newsletter. Go to the Marathon Weekend site, travel details, more magic.
Have fun and be sure to say Hi to those racing around you! Always nice to see a friendly smile out there next to you!
Oh family can get into the MK like Syko said. The monorail is running, Mom has bused with me to the staging area and I went to staging and she went to the monorail. Polynesian was open for coffee and such (Capt Crooks). People go out of the Polynesian to the road to cheer. Big crowds there. Big crowds at the TTC as well as Main Street. Any of those and you can jump the monorail back to Epcot for the finish. People also cheer as the racers go back into Epcot (where the regular resort buses drop guests). Like Syko mentioned a lot depends on your pace. I've spotted someone's DH at the TTC and then again by the Polynesian. Chester in March did that too, he was at TTC and then went a bit down the road from the Polynesian.
Good luck with yours and your sister's training!
