Hey KayWhy,
Drosera spatulata is a great sundew to observe. Easy to grow as well. You could put them outside in that condition, but you would want to do it gradually and aclimate the plant to the change. This especially holds true if they've been inside under lights, or stuck in a dark box for quite a few days.
Remember, with the tray method the relative humidity at the soil level, and closer to the tray is higher than it is away from the tray, so they should always have a good humidity if they're always sitting in water. Unless of course the wind is really high, or the sun is just that strong that day.
If you do decide to place them outside or in direct sun, don't cover them. It would get way too hot in a short period of time and actually cook your plants. Just try putting them outside, or one if you have multiple, for short periods of time each day, maybe 15 minutes to 30 minutes to start, and gradually increase the time period it is in the sun each day until you can just leave them out there.