A portable induction cooktop lets you skip the hassle of propane and cook fast at the campsite, as long as you have power. Buy a solid model now so you only buy once instead of replacing a flimsy burner next year.
Wait until the summer holiday sales wrap up to shop. That is when retailers mark down leftover outdoor gear, and last year's proven model is usually a better buy than the brand-new release.
That 0% window is a deadline, not free money. If you still have a balance left when the 15 months are up, the normal interest rate kicks in on what you owe.