Which should/want to do, work/fun?

My goal on the weekends is to build GoneVertical.com, which I am stuck on drilling entities with multiple properties in the distributed database. Whats hard is, fun things like hikes come up and then a war develops in my brain. A hike on Labor day came up as an opportunity to go on, which would be so fun to go on, yet, I already planned on finishing my subquery system for the Google App Engine query system, which is similar to a join. I'm so close to having a successful drill down system on my core-engine. More to come later.