Yes! You can pledge for as many as you like. Just adjust your pledge upward to account for the additional sets. For instance, if you would like to get two of the $44 pledge levels, just back the campaign at the $44 pledge level. Then, adjust your pledge to $88.
If you need to do this after your pledge has already been made, just click the "Manage Your Pledge" button on the Kickstater page. Then click "Change Your Pledge" and Kickstarter will let you made the adjustment.
Simply increase your pledge to include your desired pledge level and the add-ons you would like as well. After the campaign has ended you'll be able to select your items in our pledge manager. It is a very simple process.
For example: If you would like to pledge for "1 Set of Elder Dice" and you would also like one d6 set add-on then simply pledge $30 at the "1 Set of Elder Dice" level. ($19 pledge level + $11 d6 set add-on)
Sure! Just add up the total of all your add-ons and then pledge at "Make a pledge without a reward" level. After the campaign has ended you'll be able to select the specific add-ons you would like to receive. Shipping to be charged at a later date.