I just felt like running

After a little experimenting, I've come to the same conclusion. Since support vehicles will be available, I plan on just using the hand held and refilling often. I just don't drink enough when I've got the camelback.

As a side note, an observation I've made on my looooooong runs (100k +) has been that it's easy to drink enough water, but not quite as easy to regulate electrolyte intake. In my limited experience with such distances, I've always had to very consciously make an effort to get enough salt, potassium, etc.

That being said, even though no single day is quite that long, they will all be in hotter weather than any ultra in my experience, and that, coupled with several continuous days for you three brave souls, could potentially make for some very substantial electrolyte expenditures in addition to the caloric requirements that everyone already knows. I'm sure you've already thought about it, so I'm actually curious what y'all are planning on using for electrolyte replacement. (this is my biggest concern for my mere two days, so I wanted to know what you three had in mind)

I'll be downing 2 S-CAPS per hour along with some salty snacks thoughout

I do the same as Jon. I've done this on my two 8-hour races- both were in the summer and its worked well. I didn't cramp until afterwards. With this being lower intensity, I think it will do just fine. Eating that many S-caps makes you feel really thirsty after awhile.

in my first hot weather ultra (SJ 2005?) , I sucked on pretzel sticks the entire time- S-Caps are easier but pretzels and potato chips are a good supplement.