Yes. D700+24-85 will suffice. More than enough to produce pro-quality photos.
Focus more on the thinking behind getting better photographs rather than bringing more gear along.
In my opinion, if your main purpose is to go for holiday and enjoy family time, just bring a PnS or your smart phone. DSLR is overkill. Just my personal opinion, but if you bringing the DSLR, your setup is more then enough.