I think that if you can fly inverted, you should enter them inverted. It will be easier to nail the first loop, at least. It does bring up a potential point of controversy, tho. Remembering that the pattern points require the flier to enter and exit the maneuver correctly, do the correct number of loops, etc., in order, adequate level laps between tricks and all under the flight time limit. As I see it, in Beginner, where you don't do the inverted laps between the insides and outsides, you are not exiting the insides correctly, or exiting the outsides correctly, if you just do it the way the full pattern is done. One then COULD make a case for not awarding pattern points.
Now, I am not saying that is right, but that it could be a point of contention. I do Judging duty at least as much as I fly in contests, and I would not consider this to be a good thing for judges to do. To be absolutely correct, I would personally do my insides, pull out upright, fly 1/4 lap or more, then go inverted, fly two + laps inverted, then do the outside loops and pull out inverted again, fly 1/4+ lap inverted and then half-loop to upright.
The same thing happened in OTS at the NW CL Regionals, where a certain vile individual did his outsides from inverted and recovered with a concentric half outside to upright. Not correct, no pattern points. I think this would be a bogus thing to do to a Beginner.
Around these parts, we mostly have to throw Beginners and Intermediates together, but even if we seperate them, we let the Beginners fly all of the standard pattern that they can do. They cross off the stuff they can't do, and if they do what's left correctly, they get pattern points. For example, they can do a single (cross off the "reverse") wingover, no inverted, three insides, a clover leaf (or whatever), land, and get pattern points.
Steve