Hey Mike... welcome to the club! I just picked up a 1977 Scamp
this spring and have already completed some convenient upgrades to make it more habitable in the NC heat and humidity. Here's what I've found helpful so far...
Solar recharging system for the trailer battery
? Not yet but soon I hope...
TV antenna? Installed a Winegard RS-2000 amplified antenna
Small, 12V TV? Installed a NAXA 15.6" 12 volt flat screen TV
Cover for outdoor storage (Arizona desert)? Not yet because we store our Scamp under a carport
Air conditioner? Installed a Frigidaire FRA052XT7 A/C in the closet area (Installed exhaust / intake vents and drain too)
Pop-up canopy? Installed Dometic Trimline 8' canopy
The additions I've installed were not too difficult but did require some modification to the outside shell... mostly riveting and adding vents for the AC. Good luck and have fun!!