Luggage and bags:
Pack LIGHTLY. You don't need much if you are going with your spouse (no clothes; it's that private). You will be hauling whatever you bring (including; jugs of water, towels, food, etc.) from your car, down a long muddy/dirt hill, to the cabin, via wheelbarrow!
Clothing/Shoes/Weather Gear: Bring VERY comfy shoes, shoes that can get destroyed by rain/mud/being outdoors. We brought cast-off strap on sandals that we use for camping. No umbrellas needed; the cabin is sheltered by trees (God's Umbrellas!). Mosquito repellant is not really needed; for some reason we didn't get 'bugged'.
Toiletries and Medical Supplies: Bring a First Aid kit; this is a must. Some of the areas of the steps are slippery with moss. I fell the first night there and REALLY banged up my arm, to a swelling purpley bruise! Bring Advil (for hangovers, pains and such) and plenty of ice!!! Oh, and bandages. You are MILES upon MILES away from a hospital! Oh and bring toilet paper. There IS an outhouse but you can just pee of the porch if ya want. =-)
Photo Equipment: Photographers, take note: My husband, who is one heckuva great photog, took some incredible shots here. Not just of that gorgeous green-glass lake, but of the wildlife! We saw so many lacy-blue dragonflies, it was gorgeous. Nature at it's best. Bring your 'big flash' for inside the cabin, however; it's dark in there!
Camping/Beach/Outdoor Gear: Bring your own float. We brought a 2 person inflatable float. They do have a floating DOCK, but it's wood. If you want to just laze/float around on the wonderful lake, bring a blow-up raft or a couple of floats. Sunscreen is really not necessary plus it'll hurt the fishies (you are sheltered by trees). Firewood is not necessary; take a walk into the woods and you have plenty of stuff to burn in the outdoor fire ring.
Miscellaneous: Leave your experience in the journals at each cabin; whether it's scary stuff or funny stuff or lovely stuff (lots of people got engaged here!), leave your words behind; it makes for great reading for the peeps staying after you. Also, it is nice if you bring a gift for Jim & Patti. MOST people leave behind candles, pictures they've taken (we burned 2 discs for them), more journals for future use, coffee for future renters, decor for the cabin, etc. Leave something behind, because even after checking out... you take something with you.
Toiletries and Medical Supplies:
I have never been stung OR had poison ivy until my visit at the cabin (rustic cabin, not the Wild Turkey) in Hocking Hills. For those who are usually 'at one with nature', you will someday find yourself 'at two with nature', so bring along Calamine to combat the ivy and 27 foot super-bug-spray to combat the wasps.
Miscellaneous: Maybe it's age, maybe it's from having fine fair skin... who knows? All I know is last year I wound up with scarring from poison ivy obtained from the beautiful scenery of the rustic cabin, and this year, first night I wound up stung by a wasp (who had many friends that Jeff killed with the 27 foot spray stuff) and I got poison ivy so bad, I had to be put on steroids. If you don't want your hair falling out and to find weird things happening with your body days after coming into contact with that "leaves of 3, leave them be" plant, bring Calamine lotion and stay away from anything green. Calamine and ice, my saviors. Oh and Benadryl lotion, that stuff rocks when a wasp leaves a stinger in your hand the size of Alaska.
Luggage and bags:
Something water proof to hold things if it rains or it snows.
Clothing/Shoes/Weather Gear: Dress for the season!
Toiletries and Medical Supplies: I always bring meds and the toiletries we use at home with me.
Photo Equipment: Bring the film! Your gonna need it.
Miscellaneous: Bug repellent is really good right now. The Nile virus that has spread thru the USA makes it very important to wear the repellent. Just a good precaution.