"is solar or juice even nessary to camp???..."
I reframed Slow's question to ask: Is solar power or electricity useful for camping?
Yes it is. Solar generated electrical power can be usefully, desirably, economically, and reasonably used for camping.
Solar powered lights are readily available.
Luci Lights from
Amazon.com sell for under $15 apiece. There are many similar solar powered lights. Using a solar powered light is convenient and will save you from the ongoing cost of disposable batteries or kerosene for flashlights and/or lanterns. Its also more environmentally friendly.
LED lights use much less electricity than incandescent light builds. You might buy and use a LED
Rechargeable Headlamp while camping. Or install LED lights in your teardrop. I bought LED light fixtures for the cabin and galley of my teardrop from
marinebeam.com/led-lighting.
Many, if not most, teardrop trailers have a battery in them to power lights, an overhead fan, etc. The battery may also provide power to 12 volt outlets that can recharge portable devices like a cell phone, camera, or portable LED lights. Or a CPAP breathing device as others previously mentioned.
A solar panel can recharge a teardrop trailers battery so you can camp, or boondock, longer. Solar power can free you from the need for a generator or shore power. It can lower camping fees for un-powered campsites. Or make free boondocking more easily feasible.
A high enough capacity solar panel, or several solar panels, may even enable you to use an AC/DC fridge/freezer instead of an ice chest and ice. A 12 volt powered fridge/freezer would enable a longer and more enjoyable camping experience. You could enjoy Cold Adult Beverages, milk, juices, butter, meats, fruits, vegetables, a variety of fresh or prepared food you can eat while camping for longer away from home, stores or restaurants, etc.
A nice "luxury" would be to have enough solar power to recharge a teardrop's battery well enough to use a 12 volt fridge/freezer, lights, ventilation, and outlets for recharging portable devices, etc.