Now THAT is a good question to be asking. Here's my two cents:Isolation via distance or staggering your planting a so that different varieties will bloom at different times is bollocks. Bees travel a lot farther and communicate a lot more effectively than people give them credit for. So let's exclude those methods as being a crap shoot at best.I've heard about the glue approach, but never tried it. Again, though, bees can be persistent.There are a variety of floating row cover type fabrics that be had pretty cheaply if you plug yourself into the ag industry. I'm using this approach to isolate entire plants this season. As long as you're going to the trouble of isolating seed, you might as well do all you can to ensure their viability: go with seed harvested from the first pods the plant makes, make sure the pods are fully ripened on the plant before harvesting, wash them carefully to remove all traces of placenta, and dry them in a cool spot with a lot of air circulation. Seventy degrees under a ceiling fan on warp speed for about a week has worked well for me thus far.One warning about some of these fabrics: it's important to know how much light they allow through and what purpose the were intended for. I'm using some stuff I got at a plant show a few months ago that was meant to mitigate the damage lower temperatures can cause. Down here in Miami, low temperatures aren't generally a problem. It's taken a little finesse to get the plants the right sunlight exposure and the right amount of water because the fabric I'm using raises the temperature by as much as ten degrees. In too much sun, think pressure cooker.When you remove your isolation screen, make sure you mark which flowers/pods were produced. This is another reason to start with a plant that's got immature buds that are close to being ready; it becomes more of a headache when you've got both OP and isolated flowers on the same plant. Some people use string or tags for this, but I'm a fan of the "magic marker and detailed notes" approach.Even if you isolate, be aware that you'll experience some genetic drift over time as a result of mutation. It really, really doesn't happen often, and it's even less likely that you'll have a mutation that will affect the pods in any detectable way, but it does happen.Oh, and before I forget, I finally got around to getting some seeds together to go out to you. Think you'll be happy with it.
