Bob has good suggestions. There is a caveat with RC guys though. Most of the RC covering jobs these days are over balsa skinned foam wings. These are orders of magnitude easier to cover than open bay structures as is common in CL. Doing a good covering with film requires a degree of physicality. To do a proper job you have to get intimate with the airplane very much like when you are sanding the airframe. You can not just stick it in a painting stand and cover. For most of my covering tasks the model is in my lap and I and I am heating and stretching and sticking.
If you are covering in film and you don't have the feeling that you can use a pair of extra arms you are not doing it right. Because of the physicality required to get a top notch covering job in film, it is easy to accidentally iron in a warp on open bay ribbed wings. This is where experience in film coverings helps a lot. Nice thing is that a warp is equally easy to remove but could turn out to be a exercise in frustration.
Mistakes are far harder to correct. Cut something the wrong size or shape you can not just do a touch up spray job, the entire panel has to be removed and you start from scratch.
It is a myth that getting a great finish with film is easy and any dunce with a clothes iron can do it as some individuals would lead you to believe. While it is not as time consuming to get it covered to a given color than with paint. To get a outstanding finish and graphics scheme done in film is far harder. What would be your masking in a paint process is your actual covering, and unlike masking it has to stay on and add as little weight as possible. Like I said before any mistake and the entire panel has to be removed and replaced. Once it's down it is down. you can't sand away seams or irregular lines, it has to be as perfect as you can make it the first time.
On rule of thumb is be prepared to waste a ton of material. You can not achieve results being frugal or stingy with the covering. Trying to do so makes things a whole order of magnitude more difficult. Allow a full 2 or 3 inches excess covering for any surface. You need something to grab onto and manipulate. In certain areas I'll give up to 4 inches of excess.
This is not going to be cheap but then neither is a top notch paint finish.
If you keep an eye on the Pathfinder LE build thread in the building techniques section. I'll be giving a step by step film finishing tutorial on the plane. I'll just have to figure out how to snap photos while I have my 4 hands full with the iron, monokote and model.