East coast road trip need tips

Hello everybody
we are planning our East Coast road trip from Boston, to Niagara Falls, NY, Washington, NJ and all the coast way down to Key West.
We are looking for insider tips not the usual tourist traps, also restaurants and Linedance, Country and car shows.
Best outlook to Niagaras should be from Canada, right? Is the Herb Mc Candless Museum a detour of almost 6h worth?
Thanks for any tips
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