The feeding is the best tell for husbandry if it is way off the animal will not feed or will regurgitate what it did. Your temps look fine although you didn't let us know the ambient air temps just surface temps. Air temps are often ignored but are just as important. Ideally it should be 80-85 or so.

It sounds like you have a digger there. I have one who is too she likes under her paper in the rack.

The analogue humidity instrument is fine as long as it is accurate. They are dead easy to test, there is a quick 'are you working' one and a more accurate one.

The quick test is place a wet paper towel over the instrument wait 30 min and check it should read at or very near 100%.

The other is a salt test. Ideally done at 30ºC but practically it makes so little difference (less than 0.5%) it does not matter. This test can be used on any hygrometer. I actually like the analogue hygrometers that can be tested and altered to be correct again when and if they wander. The cheap cigar humidor ones have in my testing proven to be the most reliable and accurate in the cheaper price range (under 100$) There are good digital ones (wet bulb) out there but they are really sensitive to dirt and junk and need very careful perpetuation before use and are simply too fussy to use with snakes.

http://cigars.about.com/od/humidors/qt/hygrometers.htm