Penguina has been playing with her lovely new GPS that she got bought for her birthday and has started programming in waypoints with the level that the Class A starts as their 'elevation (AMSL)
Careful! Airspace altitude limits are based on what alitmeters show. Temperature changes mean that the GPS altitude will be different and you could be in the Class A before your GPS thinks you are. The effect is only about 10ft per degree at 2,500 ft but proportionately more the higher you go.
My top tip: print the first page of the AIP entry for new aerodromes you visit (or the chart page if it's separate). Then buldog clip it to the back of your folded chart. When you've found the airfield, you just turn the chart over and you've got a map to plan your circuit. You'll also know where to go when told 'vacate at Charlie then taxi via Delta to park on row Whiskey' or whatever.
Mark