Ok, this may seem like a silly question, but I know some of you experienced folks can help us newbies out. We had 19ft tt, but just purchased 34ft tt. We also now have a F250 diesel truck as our tow vehicle, previously had a gas vehicle. Getting in and out of gas stations with the 19ft tt wasn't too bad. Now with a 34ft AND having to find pump with diesel, I'm concerned about getting myself into some difficult situations at the gas station along our travels. Any suggestions and any precautions that would help out?