I would think you are safe with using Dawn or just about any product you are used to using at home. I would buy the smaller sizes of the product so it takes up less room wherever you plan on storing it. Also I found this PDI list online that might help you when you do your walk through this week. We do use the regular RV toilet tissue and even the chemical. Other stuff may work fine, but I just feel safer using it. Plus use a lot of water when flushing to keep everything wet and it helps when emptying the tanks. My advice on the walkthrough is to check as much as possible especially the appliances; air conditioner, heater and the storage tanks. I take along 2 sets of sheets, a quilt or something, 4 bath towels, etc., and a few rags. They come in handy. We use paper plates, cups, paper towel mostly, but have a small set of Corelle dishes and light weight cups and glasses and a 20 pc set of stainless steel. lightweight cook ware and a few knives and utensils. Our first trip out, I kept a notepad and pen close by as I would keep finding other things that would come in handy and would pick them up later. I did buy a 4 qt. crockpot later and I use that a lot for stuff. Anyway, here is the website for the PDI list (it is a PDF to print out) which may help with questions for the dealer and things to check on. Good luck and have fun. http://www.eaglecapowners.com/campergallery/gallery/Documents/Pre-Delivery%20Inspection.pdf