Yeah - I completely understand. My guess? Marathon Weekend because it's Marathon Weekend, more runners, longer distances, major challenges.
For Princess, this year, they marketed Race Retreat as the ultimate "Treat Yourself" splurge for women. I want to say it even came with a glass of champagne or something?
I would definitely do the ChEAR Package for her for the Half Marathon - for the 10K, I would encourage her to watch around the Boardwalk! There are places to get coffee and such, and they don't really have ropes up, so it will be easier for her to high-five you guys as you head in to the finish.
Maybe as a treat, you could book a really nice brunch on Sunday after the half? If she likes brunch?