Vacation Ideas

We have some vacation ideas that we'd like to see through before we start expanding our family in 2013. Marshall's school schedule gives us limited windows so he doesn't have to miss classes. Here is what's on the table:
2011
*Trip in mid-August to Salem, Oregon to see my parents, youngest sister, Sherri and our nephew Kyan. My brother Matt will make it if he can.
*Trip to the Int'l Balloon Festival in New Mexico during the first weekend in October. We'd travel mostly by train.
2012
*Trip to Washington, DC for at least 4 days.
*Trip to Marshall's family cabin in NW Wyoming.
2013
*Trip for youngest sister Rachael's graduation party.
*Trip for youngest brother Eric's graduation party.
*Trip to northern Europe in June/July to celebrate Marshall's college graduation.
20??
*Trip to North Dakota.
*Alaskan Cruise out of Seattle.

We know a Europe trip would be fairly expensive, and as much as we'd like to go while it would be just the two of us, I'm wondering if it is a good idea to spend all that money as we TTC. I really want to see Denmark; Marshall wants Germany; and we'd like to see Stockholm too.

2013 sounds so far away to be planning trips, but considering that we have two graduations to fly/drive to within a few weeks of each other that year, we really do need to start thinking of some options. We'd like to take a "hurray, Marshall's finally out of school" trip before he would start a full time job (if that's the path he takes). If his business takes off and is earning enough income, well, maybe we wouldn't have to take it right then. *shrug This is what happens when you're a planner by nature.