Speaking from recently finishing my ERAS app, you should definitely do SOMETHING!
Personally, I found a program I was interested, called them up, said I was interested in EM clinical (not bench) research, and they hooked me up with their research director. I worked my tail off, and had a blast hanging out in the ED, and got 3 oral presentations and a few publications from it.
It was very ironic to me when my fellow classmates would scoff at working on "the last vacation of your life!". But let me tell you, they are all kind of sweating it now when they get to "explain" on their ERAS app what they did for those 2 months in Europe, etc.
It all sounds fun, and travel would have been nice, but I had a great time myself, and if you pick a program away, you get travel to get there, now don't you!