Hi Christi,
I'm also thinking of doing ne of the Parks & Canyons holidays (June) probably the 10 day tour not the 16 day one.
The meals provided will be as advertised in the brochure or website intinery.
Don't worry though you will just hook up with others on the trip you choose for meals Ive done two JY trips and have not seen anyone eat alone.
Remember everyone is single and in the same boat, there really is no reason to worry.
Mick