Welcome! Yes, that large tank is way excessive! A 30 gal breeder would be perfect, but tubs (my opinion) are way better. I use use 41 qt. tubs from walmart. They are under $10, clear so you can still see the little dude, and keep humidity really well.

It's not really difficult to keep humidity in a glass tank, but can be challenging. Just drill some holes in, and measure humidity with a digital indoor/outdoor thermometer. If you need more humidity plug some holes, if you need less drill some more. Slap an under tank heater (UTH) on one end, and connect it to the thermostat/herpstat, and presto! You are done.

I take mine to the pet store all the time when it's nice outside. Of course, it is the only pet store I trust (you don't want to take him somewhere that may have mites, or other ball diseases). It is amazing to see peoples reaction. Most of them love it! Some seemed a little frightened, but get over it quickly when they see a little 3 yr old handling the snake. The pet store workers are really nice to us, and they are actually amazed with the different morphs we can show them.