You hit on something that I experience every time I know I'm going to go fly fishing - just the anticipation of going before you ever get there (I feel a Carly Simon song coming on). Particularly the night before, gettin my gear together, making a list and checking it twice, smiling, already feeling the adrenaline start to pump. It's like FFForeplay to make a crude analogy. It's a rush just knowing that you're going to go before you ever get there. Don't know much else that creates that kind of "anticipa-ya-tion".