Regarding tow dollies, you really ought to look at only those dollies that have brakes, either electric (my choice) or surge brakes. As stated above, most states require brakes based on some weight requirement, however, should you ever want to enter Canada, they require brakes – period.
Not sure about Camping World selling a dolly for $750, I think they only handle Roadmaster, which are quite pricey!! There are a number of relatively inexpensive dollies out there: Stehl Tow, Master Tow - two brands with brakes that sell for under $1200, all the way up to top of the line Roadmaster dollies for $3500!
We have used tow dollies as long as we have been RVing (’91), and, despite the many disparaging words to the contrary are no more inconvenient than tow bar/braking systems to use.
Good luck with your search,
John
