I ran my Q1200 off of my coach propane tank with a long extension hose without a problem.
Me thinks you can change the regulator out and then do it on yours, but then you are restricted to that service, or change the regulator out again to go back on propane. Not the best of both worlds.
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My Griddle: (Your question)
I like to cook all types of things. For some reason I didn't like firing up the grill to cook but I enjoy firing up my griddles to cook. Yes, plural, but not at the same time. I have a 36" on the patio and that inspired me to go with the griddle for the MH.
There are a few items that are limited, like maybe a pork roast or beef roast, etc., but pulled pork for instance can be spread on the griddle and heated and charred a little, along with any other items you may want to mix with it, for say quesadillas. Through cooking...move to the cooler side for warming and throw the tortillas on for toasting.
My go to is Hibachi style meal. Griddled beef, chicken and shrimp along with whatever vegetables you wish, mushrooms, all done at the same time on the griddle. I use the little throw away aluminum pans for warming..use a rack to raise them off the griddle.
Breakfast of any sort is easy. Shrimp of any size is easy to cook. Steak, pork chops, easy and searing is so easy. Smashburgers..great! Since there are no grates the food is cooked in its own juices and in my opinion makes it so much more delicious. Want to sizzle in butter, done.
There is so much versatility to the griddle. Yes, I know that one can purchase a griddle to fit on top of the grates of a grill, but just not the same. So much versatility with a griddle.
Cleaning a griddle is so much faster and easier than cleaning grill grates. Scrape the griddle clean with a scraper, squirt some water to create steam and lift any deposits, wipe with paper towels, let cool and apply a thin coat of vegetable oil...done in just a couple minutes or less.
Anyone that might be interested in purchasing a griddle should go to YouTube and in their search pane type in "Griddle," or "Griddle Cooking," or pick one that pops up when you type in griddle.
I really like the simplicity of the griddle, but like anything else it is a matter of personal preference. If you do decide on a griddle and want it to hook up to the on-board propane, check to make sure it is adaptable. The Blackstone Adventure 22" is not, but it is probably the better one for RV'ing.
Come visit and I'll cook you a meal. Hotdogs okay?
A few cookings
Ready to cook
Different one cooked and cooking.
p.s., After a while cooking the asparagas, or anything else including meat, cover with a dome and provide steam. Can even squirt a little water under the dome.