Hey Robyn,
Hubby and I are also going to commit to the 100. Yikes! That gets hard to train for when the kids all get out of school for the summer but what the heck.
I carry both a CO2 cartridge in my bag and a frame pump, just in case I have more than one flat. I also carry a spare tube and a patch kit. I'd rather be prepared then 30 miles from home and stuck.
I might do the Nashua River trail this week if you want to join me. Any day better than others?