Yes, definitely make them freezer-worthy, not fragile . Not powdered as it gets yucky when thawing.
I'd ask the group to see what they'd LIKE to make, and what they'd LIKE to receive. Keep in mind that some people will sign up to MAKE cheap and easy cookies but will be receiving cookies that cost a lot more in ingredients and time to make. I sure don't mean to be a Negative Nancy, but I stopped doing cookie exchanges after a few years of making "party pretty" cookies but getting plain Janes in exchange . It wasn't worth my effort.