ORIGINAL: RogueSnake
As far as the heavy payload goes, I plan to use retracks for gear and put a small desposiable camera in the fusaloge. And have all the correct lights on the aircraft work, including the instrument panel. All of this in such a small plane will be a challange.
The wingloading is what will be a challenge. Have you added up the weights on all of this?
If you are able to jam all that in there you'll have a very heavy, very fast model that wasn't designed for what you're trying to do.
If you can get it off the ground the odds of being able to slow it down for a safe landing aren't real high.
How much RC experience do you have?