Either day works for me. The weekend is wide open for me. I'll do either GP4 or KTYP as well. I'd prefer KTYP as I would probably get there right at opening and then stay as long as my arms/hands allowed me to.
It should be noted that KTYP requires a $40 membership fee. If you're already a member, you are good to go. Otherwise, you have to pay for the membership at the same time as the KTYP.