Q: Which product package would allow me to view horses inside trailer while traveling and have a backup safety camera?

A: If you want to view horses via smartphone, SH04 is the choice. If you want a dedicated monitor, SH02D is the choice. If your horse trailer does not have WiFi or bluetooth build in, SH01 can be the choice as well. 

Q: What is the camera length for the sh04 including the antenna with it pointing up?

A: Camera length of SH04 is about 90mm, antenna is about 60mm, total length will be 150mm. 

Q: What is the part number for the J-hook accessory? Are there any other parts needed to use it with the J-hook?

A: Camera has universal 1/4 hole under the housing, which can screw up J-hook type accessory after unscrewing the camera base. We do not sell J-Hook now, but we have an extension pole to sell online. Below is the link for your reference.  https://swifthitch.com/products/ep01-camera-extension-pole. In order to use J-Hook, you do not need other part from us.