Huffca, you sound like us - lol! I think we bring most everything you do except the clear packing tape...which by the way is a great idea!
Lots of Ziplocks! Yes we also pack a lunch as well - and have done this on numerous tours. Sometimes we'll grab roles from the breakfast buffet as well as extra bacon or lunch meat and cheeses and presto-you have your sandwiches.
We usually bring large Starbucks thermos / mugs too and make our own iced tea and bring that along. Hey, I'm all for saving money and playing it safe.
By the way, we're in Orinda...you're just over the hill from us. My grandmother lives in Brentwood.