I don't have a problem with the front rake as it seems normal to me and is just a showing of the truck being designed to work. I'm more worried about how the truck handles, especially with the camper on the truck. After all, carrying the camper is why I have the truck and could care less what folks think about it when empty.
The 35s with more sidewall will have more flex allowing more leaning and harder handling. Not to mention you are raising the center of gravity. This can be offset by adding a heavier rear anti-sway bar such as hellwig.