with two exceptions every Flying J we've been to in the past 30-years has had two separate and distinct RV lanes. They are off to the side of the "regular lanes". the other truckstops...Pilot, TA, Petro, Loves and tge rest...don't have separate RV lanes.
that being said your total combined length can't be more than 35'. our combined length is close to 60' and we can still use the 'regular lanes'; we prefer the FJ RV lanes but we can use the auto lanes if need be. it takes some practice but you can easily do it. you'll block both pumps but that's just the way it is.
Rich
Ham Radio, Sport Pilot, Retired 9-1-1 Call Center Administrator
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2016 Itasca Suncruiser 38Q
'46 Willys CJ2A
'23 Jeep Wrangler JL
'10 Jeep Liberty KK
& MaggieThe Wonder Beagle