NSW premier Gladys Berejiklian has taken a hardline stance on visitors from inner Melbourne "hotspots" after Victoria recorded 17 new cases of the virus overnight.

"I call on all organisations not to interact with citizens from Melbourne at this stage," Ms Berejiklian said this morning.

"As for resorts and other locations in NSW they are at liberty to accept or reject any traveller but we are strongly sending out a message: anyone who lives in those hotspots in Melbourne should not be moving around at all."

Wagga publican and Australian Hotels Association representative David Barnhill said it would be difficult for individual businesses "to bar people from Victoria".

"Let's just hope that they nip things in the bud there pretty quickly and find the source of the minor outbreaks and things can move forward," Mr Barnhill said.

"Because we're progressing quite quickly in NSW. So hopefully it doesn't come to that."

Wagga's BIG4 Holiday Park owner Martin Cotterell said business had been steady since NSW travel restrictions were lifted over the Queen's Birthday long weekend.

Mr Cotterell said April to October was usually a busy time of year for Victorian visitors stopping in Wagga on their way to destinations further north.

"We haven't seen any impact on that yet. I would said it would take maybe a week or two to see if we do get any impact from it," he said.

"It's yet to be seen if what's happened down there is going to impact us if there is that second wave coming."

Murrumbidgee Local Health District acting medical director Len Bruce said potential outbreaks were to be expected as social distancing rules were relaxed.

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"It was obviously disappointing that there was such a large spike in such a short period [in Victoria]," Dr Bruce said.

Dr Bruce said the MLHD, the closest medical region to Victoria, would be deploying mobile testing vans to the towns along the inter-state border to assist in slowing community transmission.

"It is always more complex when you're dealing with different health services ... But luckily we have a good working relationships with border health services," Dr Bruce said.

"I think the advice is people should avoid travelling to and from those particular hotspots and I think that's the important component there."

Ms Berejiklian's announcement comes just one day after her government opened the ski season in NSW, almost on the eve of the Victorian school holidays.