I know that there are very efficient ideas on "how to pack for a crop", but honestly they don't work for me. I change my mind too many times when I'm picking paper and embellishments. So here's what I suggest:

Choose an assortment of themes you may want to scrapbook. This way you have options when something is just not inspiring you.
Print your photos that go with all the themes you have chosen.
Although you can pre-plan your pages, let's face it, we always change our minds. So don't limit yourself to one colour scheme per topic.
Go through your embellishments, paper, momentos and gather everything up that could possibly work for your themes. This way you have many options when you change your mind.
At Road Trip Scrapbooking Retreats, you have access to 175 cartridges, cricut machines, over 1000 stamp sets, ink pads, punches, embossing tools and powders, etc. So save packing space and leave all that at home.
If you need paper, embellishments or adhesives, for your convenience there is an onsite store.

What should you pack?

photos!
trimmer
adhesives!
basic tools
your favourite tools
paper
memorabilia
embellishments
albums - we like to peek!
camera
mixed media supplies - if you use them

It wouldn't hurt to have:

table lamp (bring an extension cord)
cup holder
your own cricut mat (mats are available, but sometimes it's more convenient to have your own)
laptop/tablet - Pinterest has great ideas!
money - just in case you shop at the Corner Store or head to town

Make sure you pack:

bathing suit
beach towel
chargers
sunscreen
a good book

One last thing - start planning early! You will be prepared and get excited for a great weekend or week of scrapbooking.

How to Pack for a Road Trip Retreat