This is a typical 30A Wiring Configuration for the RV Trailers. This is bit larger than your 1994 Jayco Eagle 10-foot base POPUP but the concept is the same...
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INVERTERs really eat up your battery power especially if you are thinking about firing up an electric coffee maker. I am quite certain your only chance to have this is to use a Camping type percolator that is heated up with your propane cook stove.
This is my layout for a my 2008 OFF-ROAD STARCRAFT 14 R/T showing where most of my appliances and electronics and batteries are located. To make it through just one day/night run off the batteries I need at least 255AHs of on-board battery capacity.
Just to give you an idea of what we had to do to be able to camp off the power grid for extended times...
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Any leads coming from the tow vehicle should only be considered a DC trickle charge. The cables bring this 12VDC to your trailer is very small... Probably a maximun of 5-6AMPS DC current is all you will attain by doing this...
This is our love camping off the power grid places...
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Our game plan is to do all the things we want to run inside our POPUP for the one day/night run off of the batteries then recharge the battery setup back up to their 90% charge state by connecting the POPUP TRAILER shore power cable directly to our 2KW Generator the next morning. This takes us three hours of generator run time during breakfast time using the POPUP trailer on-board SMART MODE converter unit. We use our electric coffee maker during the time the generator is running. Our GRIND and BREW Coffee maker only needs five minutes of 120VAC to make us fresh ground bean coffee then pours up into a thermos karafe...
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To be somewhat successful you will have to plan for something very similar to this...
Of course it all depends on what you want to have running when off the power grid...
Roy Ken