Just got this rechargeable, wireless camera from Amazon for $36.99. It connects to any Andriod or Apple without the use of a router. I plan to set it on my truck bumper to hook up to my hitch. It could also sit on the TT rear bumper to see there also. Little camera has a real good picture for a cheap device.
It is peer to peer. Links well to my Android phone. Picture is good. Range is advertized as 100 to 300 feet. Works perfect to 75 feet that I have tested. Seems to work good in sun or shade. I have just had it a couple of days, but first impressions are impressive.