You really have to plan our your gas stops with a large rig.
Diesel? No problem!!!
Gas? Holy Moly if I pull into that one, I might get stuck.
I have a 34 foot RV with a 24 foot trailer on the back that takes gas. I won't even pull into a station if I can't see a clear "exit strategy"...
So is 30' too long? I'm 62 feet long in total and I manage.