It took two months, but I finally calculated expenses for my trip to Alaska and back. My gas estimates were spot on. Food/Bev could have been halved, but still wasn't bad. Miscellaneous was higher than expected, but mostly items I'll use on countless adventures to come; no regrets there. The speeding ticket was unlucky, but I shaved off *many* hours of travel by speeding; no regrets there either. An oil change was unavoidable. Overall, I was in expected range even though I splurged a little when I got to Anchorage. I'm very pleased with my results!
I can't wait to do more stuff like this - especially knowing that I can afford it! I'm thinking an overseas trip for the next one... :D