I'm thinking of quitting my job as their busy season approaches
What is your reason for wanting to quit your job during the busy season?
My boss keeps scheduling work meetings during my long week-end vacations
If your boss is behaving unreasonably and wanting you to come in on your vacation time, you are certainly justified in wanting to quit. If you want to leave with a good reference and intact relationships, you might consider not leaving in the middle of the busy season, though.
Agreed, I'm going to stay for awhile until I find another job.
That is a great choice. Leaving on good terms is a much better way to make sure you do not burn your bridges! Quitting during the busy season is pretty messed up as well.