Humidity + Vacation

[Chris72]

We are going to Florida for a week on Wednesday and I wanted to ask about maintaining humidity while we are gone.
Currently (Very healthy 6mth old B.Python) :

> Use a 20-long tank. (100watt ceramic on digital thermostat to keep 90(ish) deg on hot-side)
> Keep 70% of the screen covered. (Normally use a towel that I mist every morning)
> Water dish is 4 inch diameter - middle of viv.
> Two hides (one each end) each has a 3 inch diameter plastic lid with moist sphagnum moss.
> Mist inside the cage every morning to bring the humidity to 65-70% at 8am.
> Humidity is back to 40ish by 6pm. (so I mist to bring it to 55%(ish).

I am a little worried that while we are gone it will dry up too much in there. At the very least I planned to put the “hot side moss” in the hide rather than on it. (So the air in the hide stays mice and comfortable.)
Am I too worried? Any other ideas?
Thanks in advance. 72