PBM, so glad that you've got another set of hands lined up! That will greatly decrease your stress level, I'm sure!
I am starting to get SO excited for this HB! My kit is complete and packed into a storage bin (all except for a peri bottle, which I haven't been able to find yet and no one seems to sell travel shampoo bottles anymore either, which was my backup plan!). My birth plans are done. My checklist for DH/Doula are done (what goes in which rooms, how I want everything set up, what to take out of the freezer, etc.). I still need to make labor-aide, and I want to pick up another nursing bra. Otherwise, I seriously think we're ready!!
I found squirt/peri-type bottles in the kitchen-goods aisle at my supermarket! They are meant for storing oils and vinegars, I think. But they will work perfectly for peri rinse.