You will be OK. My Guy doesn't have any children, I have three, and he was excited to be part of our lives. He had always wanted kids, just the circumstances of his life didn't play out that way. And he's been GREAT with them and for me as a mom.
When Mr. Fantastic first left me I had a panic attack over trying to figure out how to buy a house, arrange for insurance, and make all those decisions I had started out making before we were married but delegated to him during the year we were married. Yet, when it came time to make each of those decisions, I handled it just fine. It was just a chore. When I realized the contrast between what I had feared and how it actually played out, I laughed at myself. I literally couldn't breathe over something that turned out to be easy.
There will be hard stuff and easy stuff, fun stuff, aggravating stuff, proud stuff, sad stuff, and every other range of experience in your life. Some of it will be as you expected, and some of it won't. So just worry about making yourself healthy and happy, and your boys healthy and happy, and everything else will play out.
Have a good trip and give yourself a pat on the back for being a ROCK STAR!!
Me42, H40 D12, S8, S7 A revealed: 7/13 Sep 4/14; Agreed to D 1/15
