
Exped
MegaMat Series
Car camping comfort champ, but some side sleepers find it thin.

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The best at what? - Weight - Warmth - Height - Noise - Baffle arrangement - Inflation method - Shape (mummy, square, rounded) - Length type (full, 2/3, 1/2, true torso...) - Sleep style (side, back, stomach) - Color - etc... One person's ideal pad is another person's nightmare.
For quieter, go with something that includes foam padding. Moisture control, Im assuming sweat? I recommend geting a sleeping pad sheet. Silk ones are nicely cool to the touch. For side sleeping, the thicker the pad the better. You might enjoy one of these three: the Thermarest Mondoking (more air), one of the Exped Megamats (more foam), or a Hest (all foam). I hope you have a great trip!
If you’re not backpacking and can accommodate the space to bring it with you, I highly recommend a Hest mattress. It’s the most comfortable mattress/pad I’ve found.
I love my hest. It is expensive but well worth the price. I think this will be your best option for comfort
Honestly being a heavier guy and having trouble with the self inflating air pads springing leaks and de inflating. I bit the bullet and bought a Hest memory foam sleeping pad from rei re/supply best decision I’ve ever made yes their bulky and expensive but their have a really good r value and are more comfortable then any sleeping pad iv used.
Big fan of our Hest mattresses. Though it may not be your choice if you want cheaper and lighter.
It would help to know what about it she struggles with most. The sleeping part, or the brushing teeth/washing face part? Or something else? They make ridiculously comfortable camping mats. Hest makes a stupidly comfortable sleeping mat. Better than most beds! Game changer.

Exped
MegaMat Series
Car camping comfort champ, but some side sleepers find it thin.

Exped
Ultra Series
Lightweight side-sleeper comfort, but a bit pricey and bulky.

NEMO
Tensor Series
Ultralight side-sleeper comfort, but slippery and prone to leaks.

Big Agnes
Rapide SL Insulated Sleeping Pad
Comfortable with side rails, but heavy and warmth claims disputed.

Therm-a-Rest
NeoLoft™ Sleeping Pad
Very comfortable, good service, but heavy and bulky for backpacking.

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Therm-a-Rest - NeoAir Xtherm Series