Doesn't sound to me as if you're missing much. If
I remember correctly from last year, Lydia asked the hostesses not to use any way-out supplies, so that it would be easy for people to play along. With only one challenge a day (3 on the first day), you don't even so much need prepared bases, though they're always handy!
Hope you got some PINK Core-dinations
The real must-haves are the envelopes and clear envelopes/bags, which you've already got covered so I'd say you're good to go.