If the seed was stratified by heat (i.e. baked in the summer sun) now is a good time to start them. Have GREAT patience, you might not see anything until December. I never throw out a pot sown with tuberous Drosera seed. I have had germination after nearly a 2 year wait, and I have also had subsequent germination in the same pot. Success is very unpredictable, and often relies on seed being fresh. I would sow onto a layer of white silica sand, and observe the seed weekly or so with a loup. If the seed gets moldy, it probably wasn't good to begin with. If the seed appears unaffected but does not germinate by midwinter, I would dry off the substrate, lable the pot and keep it dry and sheltered until next summer. Expose it then to the summer heat (the more the better) and return it to tray water the following cool season. Some species take up to 3 years to germinate. I have heard that D. erythrorhiza will only germinate subsequent to large scale burns in habitat, and that populations well away from the fire also germinate as a result. Smoke water would probably up your chances. I doubt you will need such for the species you mention, they are all willing growers, but patience is advisable: these are winter growers and they appreciate the cold weather.