road trip

It's possible a trip will be made by car this summer from Florida and
Michigan and back. In Florida, there are rest areas every hundred
miles. At the last word, it's permitted to park for the night. Is that
also true for other states along either I-75 or I-95?

I read that Walmart allows vehicles such as motor homes to park for
the night. Is that still true? Would if be advisable to call each
state and maybe Walmart to confirm that? Are there serious safety
issues with these methods of saving some money?


Best,
dd