We have a 31 ft. Passport Elite (35 ft. From bumper to hitch) and a F250. We have looked at a few campgrounds that were tight and spaces entirely to close, etc., but we wouldn't stay in those even if we had a smaller trailer. Just not our cup of tea. We have not had any issues to date and really enjoy the space we have on a rainy day, or late night if one of us has trouble sleeping.
Personally think it's all common sense, planning, and just experience. Sometimes something may seem a little daunting, but time and a few trips should cure that. Totally agree with others and fueling, camping, backing, is just not an issue for us.
Everyone has a different comfort level and different needs. :)
Regards,
The Piddlers