The more you use low amperage outlets, the more you become accustomed to their limits. Once in awhile you may forget and some combination of devices will pop your host's panel breaker, but experience will make you more comfortable with the idea. Don't forget the host will need to watch his own equipment if anything else, say a fridge, a fan, or a tool in his garage, is on the same circuit you tap into.
The weak point is the adapters, so try to use the best; if the ones that came with the rig are small plain black ones, then seriously consider upgrading - I've seen several of those fry over the years. Last spring, in fact, my daughter had hooked her small old trailer to our 30 amp RV port. She has a 30 amp cord off her trailer, but it's too short, and anyway I needed to hook the Beaver in the port too as necessary. So I adapted at the outlet to a lower amp 3 port tap, and she used her adapter to drop her 30 to a 15 amp cord. It worked fine since her appliances were low demand and she carefully managed them. But she'd laid her cord combination on the concrete pad. During a gullywasher rainstorm I, by sheer luck, was at my garage workbench and heard a "snap" in the main breaker panel nearby. I looked and it was the RV outlet. I stepped outside briefly (it was a downpour, remember) but saw nothing awry, so went back and flipped the breaker back on. It didn't pop again (it should have), but I heard crackling out my garage window, and went out to find her adapter and low-amp cord looking like a firework display. I threw the breaker.
She'd laid the cord combination such that the adapter connection laid in an almost imperceptible slight depression in the concrete, near the RV pad's edge. The unusually heavy rain pooled there and ran off the edge to ground, effectively short-circuiting the connection. Why the breaker didn't pop on its own the second time I don't know, since this was a direct high-current flow straight through the water to earth ground. Her black triangular adapter was a blob, as was the cord's female end; her heavy 30 amp end survived unscathed. I bought her a heavy duty yellow pigtail adapter, replaced her cord end with a high-quality female connector, then looped the cord near the connection over a heavy nail on a nearby cedar fence. I drilled a 1/4" hole in the side and near the bottom of a large empty potato salad container, and hung it upside down over the nail, the connection tucked up inside and further protected.
That last step may be overkill. Just don't get too cash conscious when buying adapters, and then minimize their exposure to water; lay them on a high point along the run, and preferably on gravel out of the rain under the coach, or protected in some way from ever lying in accumulated water, or wet grass, etc. Like anything else regarding our coaches, you have to think ahead and take precautions, but not let fretting keep you from optimizing and enjoying your ownership.
Joel
