You've done good already. You don't need the pink stuff in anything other then the drains and toilet. Remember to winterize the washer if you have one...often people forget it. It has a drain that should get antifreeze too. One thing I do is remove the water pump and rotate it around as water drains out of the orifices. Then put it back in place without connecting it. It's not very susceptible to freezing anyway but I like to drain it.
Remember that the left over water (after draining them) in the tanks won't harm them even if it freezes solid. The liquid is spread out in the fresh water tank and it's designed with the kind of plastic to withstand it. The grey and black you put in antifreeze anyway and that makes the liquids stay slushy.
Oh, another thing I did would open all the shower heads and faucets and leave them open all winter. And repeatedly flush the toilet before that final splash of antifreeze in the bowl. I have disconnected the toilets pipe too so it drains but wasn't sure that was needed with repeated flushes.
RV roofs are typically designed for 300 lbs, but, it never hurts to distribute the weight with appropriate shoes, kneeling pads, crawling where needed.
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