DD went into a bed at 18 months and would self settle by then too. I did like pp said but used rolled up towels under the sheet instead of pillows to create a bumper. Hotel beds tend to be quite high though so I'd still stress in that case. You could ask for some extra towels and a sheet. Lay the towels on the floor as a 'mattress' then tuck the sheet over. I've done this for DD when we've ended up out at someone's house past bedtime. You can set it up on one side of the bed then hide on the other side til they go to sleep - then relax on the bed all to yourself!!
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