our trip is less than 3 weeks away & one of DDs just turned 6 months - i don't know if she'll be sitting independently & well enough to sit in a restaurant-style high chair. right now, she uses a high chair at home w/ a harness & tilted back one position. can i feed her in our graco duo-glider (front/back) in the restaurants? i was thinking also that i may want to bring it in if she's sleeping. we have PSs for lunch & dinner at sit-downs: Crystal Palace, Chef Mickey's, O'Hana's, Coral Reef, H&V, & Biergarten. Will these places allow this? If not, will i have to hold her in my lap? we won't have a car seat w/ us. W/ a stroller, will this effect where they seat us? thanks.