First Camping Trip in Rio Grande – Dog Canyon Campground (technical details)

Our first real camping trip in Rio Grande was at Guadalupe Mountains National Park: Dog Canyon Campground. Over the long Labor Day weekend.
No hookups. Generator hours from 8AM-8PM. A prime place to attempt boondocking for the first time where we aren’t too far away from home – just in case some things didn’t work out.
My main concerns transitioning from the our Lance to the Airstream were the tanks, solar, and battery.
Tanks
Lance had 45-gallon tanks for all three – fresh, gray and black. Airstream has 28, 19, 12, respectively. Initial edge to the Lance. Real world practice tells a different story. In all our 3-4 day camping trips, which are the majority of our trips, I never filled our fresh water tank with more than 25 gallons and I still emptied some when we were done. 28 gallons will be sufficient for most of our adventures. Black and gray tanks should never be more than your freshwater capacity anyways. When hitting multiple sites, there is always a place to dump and refill water if necessary.
The one trip a year where that might suffer will be our annual Big Bend Ranch State Park trip. Years ago we would spend 10 days in that park without needing to hook up and drive to dump/refill. We haven’t spent that many days out there for the last 4 years. We’ll manage.
Solar
Lance has 400 watts of solar while Airstream has 200 watts. Edge to the Lance. This will have to be increased. 200 watts on the Lance was sufficient when the fridge, furnace and hot water tanks used propane. 200 watts of solar was enough to charge our battery back up to 100% by the new day’s end.
The Airstream uses no propane. The fridge is a 12-volt compressor which draws 3-8 amp hours depending on how hard the compressor is running any given moment. Propane fridges barely uses .5-1.5 amp hours depending on whether it is actively burning propane for the absorption. The Airstream’s furnace and water heater is a single Timberline 2.0 hydronic unit that heats up a glycol which then transfers the heat to your water for instant-on hot water or runs the glycol through a radiator with fans for your furnace.
While the hydronic heating system uses no propane, it does use gasoline from the Airstream’s gas tank at a rate of about .18 gallons per hour when run on high. So maybe 2 gallons consumed overnight max. And from the battery, about 5 amps per hour on average. I expect to lose 40 amps hours overnight from the battery.
I will be looking into seeing how to get an additional 200 watts of solar on the roof. I know the controller can handle it.
Battery
Lance has a 200ah lithium. Airstream has a 270ah lithium. Airstream is the clear winner here in specs, but is necessary considering the draw from the battery will be considerably more than what we are accustomed to.
Summary
Even though the solar isn’t enough to charge the battery during the day, it does manage to keep the battery loss to a minimum of 5-6% loss throughout the day as it keeps the fridge and exhaust fan running.
What makes up for this is the included Onan generator. We kept some interior lights on during the evening hours. Fan on medium-high all night with the windows open. Fridge running. Fired up the Timberline briefly for some hot water. When we woke up the next morning we turned on the 3000 watt inverter to power up the Keurig coffee brewer 3 times. All this brought the battery level down to 61%, or 164 amp hours. After running the generator for about an hour, the battery was back up to 100%. That was super-impressive to me.
Next post – will be about the camping/hiking part of this weekend.





