Is there a way to set up a telepad to teleport you to a random or spawn location in a specified dimension that does not have a telepad already there? Players in my modpack start in a special dimension, and I need a way to send them to the overworld after their tutorial. I just want them to go to the overworld, I don't really care where, but there will not be a telepad in the overworld already.

there is currently no such way.

Looking to implement one

I have this now completed and will upload a version of it to curseforge.

if you check this before the wiki, here's how the config file treats entries :

teleport {
# [x,y,z,dimension,locationName] locations can be defined exactly (100/64/100/0/Any Name really), with margin (-500#1000/64#128/0#500/-1#1,Some Location Name) or random (random/random/random/random/LocationNameHere). values can be mixed (-100#5000/random/100/0/yourLocationNameHere) is totally possible [default: ]
S:"teleport locations" <
100/70/100/0/100 TP
-1000#5000/32#64/-1000#5000/-1/Nether Spawn
random/64#128/random/0/random world location
>
}

Great to see, thank you!