Brack,
You'll look more professional having two cameras on you; there will be no mistake as to who the paid photographer is. And, have one with a 200MM lens on it; looks impressive to the common folk who sling-out their DSLRs.
I can see you and I are on the same page on this, John.
Another little "tip" to help us get the respect we deserve
is to make sure to always use a lens hood - makes your
equipment appear bigger.
See here ... this is Shadow's new lens on a cam ... it's
the 24-70 which is a good-size lens in itself even without
a lens hood:
Now have a look at that exact same lens but this time with the
lens hood:
Remarkable improvement, wouldn't you say?
I think it's self-evident which setup is more likely to bring
in the requests from the guests
to get your business card. 
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"We'll always show up at the wedding with a gift bag for the bride. Inside we have these incredible fuzzy slippers in the teal of our branding."
And, have one with a 200MM lens on it; looks impressive to the common folk who sling-out their DSLRs. 
