I know, it's hard and pretty unhandy, isn't it? My lo doesn't sleep away from home for naps either. I am well aware that this info doesn't help you now, BUT it gets a little easier when they can stay awake for longer periods of time, then you can make it out and about more. When ds was that age, I remember feeling the walls close in too.
I recently posted something similiar and apparently it's a matter of biting the bullet and getting them used to new surroundings. DS is the first grandchild for my inlaws, and I think my MIL takes the fact that he doesn't sleep there a little personally.
Hang in there.
Cindy