jchthys:Miland’s situation does not cover the range of meaning of including that I intended.

Which range of meaning in 'include' that you intended, does enhavi not cover?

Concerning inkluzive, PMEG (first box, last example) indicates that de should be used, but as with prepositions generally it is possible to use the accusative instead (last box, third example).

Thus we would be right in saying either Mi estis en pluraj ŝtatoj, inkluzive de Nov-Hampŝiro kaj Nov-Ĵerzejo. or Mi estis en pluraj ŝtatoj, inkluzive Nov-Hampŝiron kaj Nov-Ĵerzejon.