I was away for almost a week back in February, and I remember posting at the time that I thought I was going to miss my scale more than my husband.
I was also going to post about the hotel having a scale in the fitness center. And if they do, that's a good reason to get down there... and you might as well get in even a quick workout while you're there weighing!
Honestly, the workouts will help if you can commit to fitting them in. I was new to working out when I went on my trip, and knew I had to commit to working out no matter what lest I backslide into the sedentary life that was my comfort zone. I worked out every day I was there except the day I was flying home, and I was thrilled to come back after my trip and see that the number on the scale was down by several pounds!
Edit: Oops, sorry, I was writing my post and didn't see your most recent one. Getting in to the fitness center for some short runs sounds like an excellent idea.