On Kickstarter, you only have to back a project once. Once you're a backer, you can have access to any of the reward tiers you'd like. Here's how:
1. Make a pledge for one of those tiers.
2. After you've pledged, click on the green 'Manage Your Pledge' button.
3. Increase your pledge amount to the total of all the rewards you'd like.
4. Then, you can let me which specific ones you'd like either by sending me a message, or by answering a survey I'll send out after the campaign has ended. Either way, we'll make sure you get exactly what you're looking for.