My simple answer to the filtered fridge water is NO.
Plastic pots are the best. Ceramic are next in line....be sure they're sealed well. Stay away from terra cotta, cement, clay, etc.,.
The seeds can last for years. Seal them well in plastic or mylar bags and store in the refrigerator. I keep mine in there. I'm pretty much a newbie, myself. What I usually do is plant 3/4 of my seed bank seeds and stick back maybe a fourth of them in the refrigerator. Be aware that sundew seeds are *VERY SMALL*...I mean, "VERY VERY SMALL". Some look like dust. I got a package in one time that I swore they forgot to put the seeds in the envelope...then I decided to get a magnifying glass and look to be sure...and, they were there!!!!
The seeds will come to you in a folded up little envelope. I usually take a white sheet of printer paper and turn the edges up an inch or so on all sides to catch any bouncing/rolling seeds. I also use a smaller, probably 4" square sheet of paper with two opposite edges folded up 1/2" or so. I lay the small sheet of paper in the "tray" of the larger sheet of paper and open the seed envelope over it...in case some spill. I then take the envelope (do go slow opening it to be sure you don't spill the seeds) and slowly tap seeds onto the smaller sheet of paper. I use the small sheet of paper to slowly move over the surface of the pot as I slowly tap it...hoping to scatter the seeds out over the entire surface...sometimes it works and they're scattered...sometimes there may be a clump or two.
Have your peat moss and perlite mix good and moist. Put a fine top layer of peat, say 1/2" layer of 100% peat scattered over the top of the peat/perlite mix. This helps the seeds to make good contact with the moist peat moss. You *don't* want to cover the seeds...they're tiny and if they fall into a hole you may never see them again nor a seedling sprout...simply sprinkle them with the sheet of paper over the surface. If you have a pump spray bottle gently mist the top of the pot once the seeds are scattered. I usually cover my planted pots with clear plastic...saran wrap works, I use about anything I can find. These plants take 100% humidity for a while but I do like to give them a tiny bit of ventilation...a crack/slit here or there in the plastic covering. As soon as they germinate they need very good light.
Kentucky...you shouldn't have trouble locating the growing mix ingredients.
If you let ChefDean know that it might be a couple of weeks I'm sure he'll work with you on it. Just tell him you want to send him a kitten and he'll be so excited he'll probably hand deliver the seeds to you so he can pick the kitten up from you...he'll be forever grateful!!!!!
Have fun with the new hobby...it can get addicting.