I'll be in SD with the rest of the NorCal crew for sure! Regardign the diet rootbeer...I'm really nto sure. Soem people exhibit an insulin response to artificial sweetners and that might buggar some of the benefits of IF. You however are lean and active so it may nto matter at all. Sorry I'm not much of a help on that but in general you should have rock solid mental clarity and energy with IF. Keep an eye out for foggy-headedness after the rootbeer. If you don't experience anything like that, no worries IMO.