Totally get the Diet Coke thing! Diet Coke is my caffeine of choice. And only Coke, no Pepsi.
I like the idea of getting some on the plane. Ask the flight attendant if you can have a can, or mayble 2. Say you're really thirsty!
Love SW and no fees.

Are you going to use ME? If so then you won't even have to worry about retrieving your bag(s). Just get on the bus and your bags will follow you. In that case you could bring quite a bit of food in your bags. The one thing I've never brought (especially since 9/11) is peanut butter. I think it's really difficult with the scanners. And if your bag is full of food, do you really want to have them open it up and see all you stuff?
Oh, oh, oh, I just thought of a way to save a little bit more money. If you could pick up some assorted condiments (like p.butter and cream cheese,etc.) that you can't get at POP, at places you visit at home, you could bring those along. My DM is always excited when we find relish in those little packages-she loves to mix it with her tuna. A couple mayo packages, can of tuna, few slices of bread, and you've got a meal!
All the times I've been to the Hess station I realize I've never been inside. Sounds like they have some good deals in there! We'll be doing the QSDDP so maybe we'll have to check it out!