Tarps will not do anything. Forget it. The basement is your best bet, as long as it doesn't go below say 40 degrees F. Worse case do what I do, put in the refrigerator. Sarrs and VFTs don't need light during dormancy.

Thanks. I kind of thought that myself, but sometimes I like to hear it from someone else..lol

I moved all my CPs(all are temperates) down to the basement, on a shelf, by the window, with a 48'' shoplight about 5'' above them, containing plant bulbs, set on a timer for 8 hrs, matching the daylight period here.

I will have to give some thought as to how to handle the VFTs, my goal was to leave everything outdoors and have it survive. I could try my little shed and place the bog in that, with a space heater run at the setting to just above freezing.

Interestingly, I'll have the opposite problem with the darlingtonia......such is life, back to thr drawing board!

Zone
Fahrenheit
Celsius
Example Cities
1
Below -50 F
Below -45.6 C
Fairbanks, Alaska; Resolute, Northwest Territories (Canada)
2a
-50 to -45 F
-42.8 to -45.5 C
Prudhoe Bay, Alaska; Flin Flon, Manitoba (Canada)
2b
-45 to -40 F
-40.0 to -42.7 C
Unalakleet, Alaska; Pinecreek, Minnesota
3a
-40 to -35 F
-37.3 to -39.9 C
International Falls, Minnesota; St. Michael, Alaska
3b
-35 to -30 F
-34.5 to -37.2 C
Tomahawk, Wisconsin; Sidney, Montana
4a
-30 to -25 F
-31.7 to -34.4 C
Minneapolis/St.Paul, Minnesota; Lewistown, Montana
4b
-25 to -20 F
-28.9 to -31.6 C
Northwood, Iowa; Nebraska
5a
-20 to -15 F
-26.2 to -28.8 C
Des Moines, Iowa; Illinois
5b
-15 to -10 F
-23.4 to -26.1 C
Columbia, Missouri; Mansfield, Pennsylvania
6a
-10 to -5 F
-20.6 to -23.3 C
St. Louis, Missouri; Lebanon, Pennsylvania
6b
-5 to 0 F
-17.8 to -20.5 C
McMinnville, Tennessee; Branson, Missouri
7a
0 to 5 F
-15.0 to -17.7 C
Oklahoma City, Oklahoma; South Boston, Virginia
7b
5 to 10 F
-12.3 to -14.9 C
Little Rock, Arkansas; Griffin, Georgia
8a
10 to 15 F
-9.5 to -12.2 C
Tifton, Georgia; Dallas, Texas
8b
15 to 20 F
-6.7 to -9.4 C
Austin, Texas; Gainesville, Florida
9a
20 to 25 F
-3.9 to -6.6 C
Houston, Texas; St. Augustine, Florida
9b
25 to 30 F
-1.2 to -3.8 C
Brownsville, Texas; Fort Pierce, Florida
10a
30 to 35 F
1.6 to -1.1 C
Naples, Florida; Victorville, California
10b
35 to 40 F
4.4 to 1.7 C
Miami, Florida; Coral Gables, Florida
11
above 40 F
above 4.5 C
Honolulu, Hawaii; Mazatlan, Mexico

According to the zone map thingy you live in Tennessee or Missouri. You can leave your plants out there all year long. A bit of mulch would help (peat, pine needles, etc...) Or you can do like I have done - attic by a window.

I actually live in PA, I just guessed on the zone, b/c I am not a zone 7, but not quite a full level different then zone 7...lol
I am in the lower, central part of PA, very near MD. We might get a 5-10F difference from zone 7 MD, but it usually a difference of 3-5F,so I made an estimate. Winters her give us some snow and drop down in the single digits or low teens reguraly for a couple of months. Below zero temps are not unheard of, but not common either. I have them in a basement, since I just purchased them form someone who grows them outdoors here, so they are nearing dormancy. He has large, in-ground troughs, that offer more portection than my above ground bog.