I am still in the building mode, but am considering getting a side tent offered by Camp-Inn:
http://tinycamper.com/accessories.htm (click on side tent on right hand side)
As far as the vent fan, you may want to add in a resistor or PWM to slow it down to reasonable sound levels. Here's a thread discussing this:
http://www.tnttt.com/viewtopic.php?t=25351&highlight=fantastic+resistor
I'm one of those that can't sleep for the first night in a motel because the bed and pillows are different. In the teardrop, I can at least address the pillow part and bring along my home pillow.