All day adventures:

#1 lunch for a full day trip is a carne asada burrito from your favorite local taqueria... not Baja Fresh or Una Mas! (or No Mas! as I like to say), but a small, real Mexican burrito shop. Be careful with your burrito, because it can be smashed by your elbows in your floattube storage bags (especially the Outcast fat cat series).

Shorter trips:

Clif Bars. Those things will give you some sustained energy, and I like the taste. They have some oats for texture and aren't like the flavorless goo in power bars. Apples are tough to beat. Beef Jerky is solid. These foods are easy to transport and can be kept at home in large quantities for a quick trips.

Mike F