A VCS is important whether you're working alone or not.
Really, it should be there for those moments when you realize you've made a mistake and want to rollback to what you had yesterday or this morning, or maybe you've just made a different decision in the implementation and want to branch so you can test things out without effecting the core of what you've written so far.
All in all, it is a nice thing to have. And you're better off being safe than sorry.
As far as the bug tracker, that is more your personal preference. I like Redmine, which integrates with SVN, git, etc. Others prefer Trac. But either way they will be able to run on your laptop while taking a minimal amount of resources. Especially when you consider that you're the only one using them.
I would check out http://bitnami.org/ they offer packaged Bug Trackers that you just execute and it will start its own little server on the port of your choice, and you can stop it when you're not using it.
