These suggestions and lists are good. Everyone is different. For example, in almost a year, we haven't found the need for a walkie talkie setup nor a separate fridge fan, but you might. It's part of the experience to find out what you need. My suggestion is to save money and not over-purchase until you have some experience with what you need. E.g., you probably will want some basic tools, replacement bulbs and fuses, etc., but you may want to find out what your particular rig requires before buying very much.