Awh, Lemonade is a great name! He should also get a lot more yellow as he grows, so it’ll fit even better in a couple months :)
Yep, plastic plants are fine! And yeah, basically they feel a lot more secure when they have stuff to cover them. I’d put one hide on the warm side of the enclosure and one hide on the cold side, then some plastic plants all over the enclosure
Also, the log could probably work fine, but I’ve found that some leopard geckos feel more secure in hides like these that aren’t as open; https://www.amazon.com/Exo-Terra-Reptile-Cave-Medium/dp/B001F3YJ9O?th=1&psc=1
Feel free to ask if you have more questions, cheers!
I know this is overkill to list it all out, but this is what I listed for somebody else a little while back. Yes, you're probably already doing most of it.
You want a digital thermostat controlling that heat pad, with the probe either between the pad and glass or right on the top side of the glass (centered on the pad). You also need to lift the tank up a bit and stick the heat pad to the glass. Airflow under the heat pad will allow it to breath and last longer.
Turn off the light. Your LG is nocturnal and doesn't like the light. Turning of the light will encourage it to venture out during the day as well as at night.
Here's the type of hide I like to use: http://www.amazon.com/Exo-Terra-Reptile-Cave-Medium/dp/B001F3YJ9O/ref=sr_1_2?ie=UTF8&qid=1463847094&sr=8-2&keywords=reptile+cave
I have a couple of these hides. My snake is about the same age as yours, weighs a little over 300 grams and fits in the medium sized ones pretty well. Not sure on the size of your snake but the hides come in different sizes with slightly different designs. I bought them on Amazon but I've seen the same ones at multiple different pet stores.
On Amazon !
I got it from my local mom and pop pet store. It is available on amazon though ... https://www.amazon.com/Exo-Terra-Reptile-Cave-Medium/dp/B001F3YJ9O/ref=sr_1_1?ie=UTF8&qid=1481306407&sr=8-1&keywords=lizard+hide
I have two of these hides. They work pretty well and have a nice natural look if you are going for aesthetics and aren't into putting plastic boxes in your enclosure.
https://www.amazon.com/dp/B001F3YJ9O/ref=cm_sw_r_cp_awd_YuQixbYZXMWJ1