Can the hoagie sit for hours and still taste good.

Yes but your better to get the dressing on the side tho so it dosent get soggy

Yes get dressing on the side

After 4 hours you heighten the risk for food poisoning. If it will be going to a outdoor event id suggest a cooler with Ice to keep it cold. But yes it will still taste good.

Yes just put dressing on the side

I get the dressing and vegetables on the side.

Yes it will be fine just put dressing on the side

Yes order dressing on side

Just make sure you refrigerate it.

Yes

Yes. Get mayo on the side