You need to open it up more often, especially during swarm season, and maybe less often other times (certainly winter) of the year if there are no apparent issues or disease concerns.
Inspecting a double deep hive with a nearly full super is another step up in there game and the concern is, like @JimM said, that cute gets in the way of function. I personally grimace to think of doing an inspection the way your hive is situated but if it works for you, I suppose that is the most important thing. In time you may find that the more steps and challenges that you experience when you have to take to do an inspection, the more likely you are to make excuses and not do it on a regular basis.
I think everyone just wants to make sure that design is not interfering. Also, despite a lot of concern, ants are rarely a problem for the bees. Water, as long as it is reasonable close, does not need to be immediately adjacent to the hive. Like I mentioned before, I suspect that you are going to have more drowned bees than average. Quite often, like when the workers are driving out drones, they fall to the ground coming out of the entrance… even if you have the log for them to climb out, you’re making their job harder, and for little practical purpose.