Leave the MacBook at home! I have an iPad (not the mini...too small for me) and it will do everything you need to do on vacation. Web browsing, scheduling FP+, ADR changes, etc. If you're certain you'll do reading on your trip aside from the plane, bring your Nook also...if you are only going to use it on the plane, I would leave it at home. It's just one more thing to carry and potentially lose. I just play games and watch movies on my iPad during the plane ride (7 1/2hr flight which includes a 1hr layover).
I would say you can do everything on your iPhone but I think the battery life sucks and everyone I know with one tends to charge it mid-day. I have a Motorola Maxx which has a 48hr battery life (and larger screen, which is why I find iPad Mini screens too small).
So...I vote for iPhone, iPad Mini, and Nook only if you will use it during your vacation.