BREASTFEEDING MAMA QUESTION:

I'm on a cross country road trip from New York to Arizona right now.. All together a 36 hour trip. Currently have like 18 hours left. My 7 week old daughter is sleeping 4-5 hours at a time before she wakes up to nurse.. She usually only sleeps 1-2 hours at home. I'm so happy she is getting good sleep finally but Is this bad for my milk supply? And if it does effect it is their ways to get it back up once I get home?