I have used the threma-cell on two solo's.  I really like it.  I set it on a rock next to me, when sitting by the fire, or just sitting.  You can see the cloud of Permethrin, it spits out,  Basically it has a butane cartridge that heats up a pad with Permethrin on it.  So it is kind of like your own portable Skeeter/fogger like I ran through on the streets as a kid.
It works great when it is calm or there is a slight breeze, If windy not so good, but then if it's windy, the darn skeeters, dont bother you much anyway.  The thing is, you got to remember to shut the darn thing off!!! or it will run untill it runs out of butane, (learned this the hard way)  Pads last about 4 hours, but butane last longer then that, so MUST remember to shut off.
SunCatcher