Early hours include all plus members as well. So yes from 7 until 10 A.M. it's less busy and can get in and out.
From their website "Sam's Club has begun offering its consumer AdvantagePlus members access to early-shopping hours from 7 a.m. to 10 a.m. weekdays, and 7 a.m. to 9 a.m. Saturdays, in all of its U.S. locations. ... The warehouseclub retailer instituted Gold Key early-shopping hours in the late 1980s exclusively for its business members" looks like your good to go early!
Early entry for Plus members only from 8-10a M-S, Sunday 9-10a. No more early hours for business members.
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