Does you SO take guys' trips? How often and for how long?

I expect the typical bachelor parties and guys weekends from time to time. I make sure my parenting needs are met so I can balance work and the kids. Otherwise he's pretty free. Until now. A few weeks ago DH pitched what I understood to be a 7-10 day trip abroad. I had just wrapped my mind around it and said ok when he told me it would actually be 14 days. FWIW - he says that was a miscommunication and not some bait and switch game.

I know 14 isn't that much longer than 10 but I am pissed. Now I want to say no to the whole thing. To make it work I need someone to come help me while he's gone (tight drop off/pick up schedules, in case of sick kids, and I had an interview this week so I might have a new job by then). I thought I could have grandparent for 3 or 4 days and handle the rest. But I don't want anyone in my house for 14 days. Or finding a babysitter for 14 days.

I want to find a way to make this work because I love DH but I also think it's an insane request. This is not something that would be reciprocated later when I go on a two week jaunt on my own.