Hi C.,
I remember the first time I left my girls, and I went to California! They were 1 and 2. It was a business trip, but still, I was crying on the plane. (my husband was home with the girsl) I found it amazing how great it was to be alone again, I was gone for 3 days, 2 nights. by day three I was ready to go home. I also stay home with my girls, who are 3 (tomorrow!) and 4 1/2. I have since had maybe 4 nights, not at once, but 4 total and trust me, its well worth it. You are a better mom to relax, clear your mind, and go back a much happier mom. Your husband will thank you too! Its so stressful to stay home, and being home all the time makes it that much harder to leave. Trust me, you'll be saying, why didn't I do this sooner and I need to do this more often!
I also am always honest where I am going, my girls will cry that they want to come with, and it breaks my heart, but 5 minutes after I leave they are fine. I always call to see if they are ok, my husband laughs and says have fun. Remember too, you are always with your kids, its nice for them to have a break from you too and bond with your husband. And he'll appreciate you even more when you come home! ;-)
Have a great time, and don't worry, they'll be fine and you'll be fine too!
;-) H.