I'm afraid this is not possible with Plogger. As an alternative, you could do "Spring Break - Day 1", "Spring Break - Day 2". It's not what you want, but may serve it's purpose. That's all I can think of.
Darn, that's the saddest thing I've ever heard re: Plogger, haha. The problem with Spring Break Day 1 (originally the Albums would have been something like, Day 1 - Guatemala; Day 2 - Costa Maya; etc.) is that really it would be Spring Break Day 1 - Guatemala. The title gets really really long and as a result, the page that lists all the albums does not look nice and neat - the tables get all funny and misaligned. Is that fixable?
You can edit the HTML in version 2.1, which is a bit messy but perfectly doable. Version 3, currently a developers release, is almost done and has themes with it. It will be a lot easier to create your own theme or modify one of the pre-existing themes.
In the meantime, if you want to edit version 2.1, you can mess with the HTML bits of code. I believe there's somewhat of a guide to help you. I don't know where it is.