Actually my techniques are no different than that of the industry - a very large fraction of aerospace composites, glass or graphite, are made with conventional ovens, not autoclaves. The trick in achieving good properties is not so much a trick as it is an exercise in following proper layup procedures, especially in layups that have a substantial number of plies. Since thick laminates would tend to have difficulties in achieving a proper level of compaction (flatness), it is very important to laminate, bag and vacuum debulk the layup every five layers or so. Failure to do so can result in poor compaction (a laminate that is not as flat as you'd want it to be) or a layup with voids. Both are of course to be avoided.Orion has been working out some techniques to make parts in molds with pre-pregs of somewhat higher epoxy fraction to eliminate that need for the autoclave. Understand that the autoclave does two things: First it applies several atmospheres outside the bag, which can make for more compaction than an ambient vacumm bag does; Second it raises the cure temperature.
I did not include Orion's methods as I suspected they might not be ready for the rest of us yet, although I am quite interested in them....
Keep in mind however that the autoclave will not necessarily fix this so even then it is important to use the debulk techniques throughout the layup schedule.
And regarding the higher epoxy fraction, that's more an issue of choice. In the past I've been ordering prepreg with about 34% to 36% resin content but in doing so I've noticed that my surface quality tends to vary a bit. While this is somewhat an issue of the resin content, it seems to be more the issue of my tools (longer story here so I wont bore you with the details - bottom line, tooling cost issue) so to fix that I've gone to a resin content of 38% to about 40%. This is a bit stickier than I like but it gives me a very consistent surface without the need for a sheet molding compound (sheet layer of epoxy without the fiber reinforcement).
Strength wise this higher resin content is not much of an issue since the laminate properties are calculated for the fiber and material rather than the finished laminate thickness (which doesn't vary all that much anyway).