I haul a 36 ft 5er with a quad cab Dodge. Never had any issue getting in and out of fuel stops. Just use your technology to find fuel stops and if not noted RV island on the web, they usually have them indicated on billboards along the highway 5 to 15 miles before the exit. Time your fuel stops for convenience. Often I would drive on to the next major fuel exit for an RV island.
HOWEVER, I have never had any issue with truck lanes either. They simply smell horrible and you track all that oil and grease into your truck. People inside the truck lanes are "generally" polite. Pro truckers look at you as a novelty. After all this driving is WORK for these people
Tips: pack a pair or two of rubber based gloves and hand sanitzer. Keep them handy in the cab so you can use them fueling. Otherwise your steering wheel leather will take in all that oil you will get from the pump handles. Those long handle windshield washing sticks lying in those pails are a hot bed of germs. Might want those gloves and hand sanitizer for them as well.
You might consider going to Walmart and buying 1 or 2 really cheap rubber mats if you have carpet mats. I have aftermarket colorful rubber mats that I use and have my carpet mats stored....just say'n....