Re: What to do when away?
There is usually a big growth spurt sometime around 6 weeks, and fussiness is really bad at that time. If you can hold off just until that passes, then the fussiness may get a little better and things might be easier for all of you.
In the meantime, I think tucking your baby in a sling and going for a walk and finding a good home workout is a good idea. I did a huge amount of walking when my son was a newborn because I needed to get out of the house, but I couldn't leave my baby very easily so I wanted to be able to bring him along. It worked out very well for me.
I agree that it is good to get a little "me" time when you need it, but I would try to find a way to pump to cover any missed feedings this early on because your milk supply is still pretty vulnerable to external influences. Maybe you could pump in the car to or from the gym. Also, my husband was usually able to calm my son by taking him outside for walks.
K. Sophia - Mama to my little lactivore, the amazing Mr. X (11/10).