I'm getting a little too lazy to make a room and try to find the mod I wanted.

How about /jo hunters xspar.tbm?

Good, simple idea
Or maybe a game rule custom save system?
In the pause menu maybe to access it and simply click on what you game options you saved(including mod)

That's a good idea too.

There's a little danger in it, I figure.

Fuze, your idea could be more safe.

I wouldn't like it if I type the mod I wanted and made an accidental typo.

Good job.

you can just go to mods,type the first letter of the word of the mod,roll down and select,if the mod is at the bottom of the list,press the next letter of the word