So, that outta the way, here goes.
I had a trip this last weekend planned with one of my daughters (#2, shes 8 and likes turkey hunting!) to chase the gobblers nearby.
We figured we'd take the tear to make meals easier, and then we could sleep in an extra hour before we had to get up to start hunting.
Forecast called for overnight lows of upper 20s, so I was worried about her getting too cold.
I took a little time to install 110v in our camper before hand, and mounted a surge protector up on the wall, so it would be away from anything else, so I could plug in this little heater. My local Ace hardware had it for about $30 (buy local, etc http://www.acehardware.com/product/inde ... =114563096)
I figured at 350 watts it was sized quite well for a TD, and with a built in thermostat I was less likely to cook us out of the tear.
Two fan speeds, a shutoff timer, and the thermostat worked well enough (I doubt it was perfect, but I could hear it cycle on and off). We cracked a window and the fantastic a tiny bit, and were comfy all night long. I doubt this thing would heat up a bathroom, let alone the 250sq ft I saw claimed, but for a TD it might just be perfect. Further evaluation is required

If you are in the market though, I recommend it so far at least!