Hotel, travel sectors help boost spending to highest level in 13 months, says First Data.
Payments processor reports highest spending levels since last summer.
CUNA Mutual Group economist Steve Rick forecasts only a 3.5% growth in savings balances this year.
The payment processor's monthly SpendTrend report said despite the dip, overall spending remains healthy.
CO-OP says artist supply and craft shop spending jumped 83% from 2013's Mother's Day weekend figures.
Merchants saw a 19% increase in spending by credit union members over last year's figures.
While spending dropped overall due to winter weather, retailers selling necessities and cold weather supplies saw robust growth.
Younger set also outspends all others in leisure activities, survey finds.