How far are you towing the trailer to go camp? TPMS and a temp gauge are not really needed especially for short trips. Keep your wheel bearings packed and tire pressures right and you won't have a problem. People tow 1000's of miles a year without TPMS or checking their wheel temps, heck most don't check their tire pressure or pack there wheel bearing every year or two. You have to remember that most guys that post to forums like this are hard core trailer dudes and the trailer is there hobbie and they like to play with there hobbie hinc all the extra stuff. Use your rig and decide for yourself what you need and don't need.
Kind of funny if someone brings up nitrogen in the tires they are run off the forum but the same guys turn around and tell ya to get a TPMS system. Well I don't have the pressure fluctuations that air does with nitrogen so I am not always messing with air pressure in my truck or trailer when I go from 60 degree weather to 100 degree weather. My findings are the TPMS system will drive you crazy unless you have nitrogen in your tires and even then my TPMS system has been known to tell me I have a flat tire one minute then telling me the tire is fine the next so a good pressure gauge is a good idea.
