They were still doing a little bit of that in 1987 when I started working there. There were no depots at the resorts by then but we still took a few cases; growing car ownership and package holidays killed that job off.
Rainbows of Southwell were one of the biggest carriers in the area; even in my day, after they became part of the Nightfreight group, there were daily runs to Norwich, Kings Lynn and Hull, and up t'other end we went as far as Glossop, and down to Hinckley. The fleet was predominantly Bedfords (they had a franchise for some years) though I was told by some of the older drivers (many of whom had gone there straight from school) that in earlier days they had Vulcans and other exotica. Their breakdown truck was a real beast; Bedford TM 6-wheeler with a Detroit diesel two-stroke in it. The original V6 blew up and turned into a V3; David Rainbow, who ran the garage, couldn't source a replacement so instead fitted a V8 which necessitated the bonnet being adapted to make it fit. The fitter who collected it from the local engineering firm reported that if you booted it in third it would pull a wheelie!
As with many long-established family firms of that era, there were inevitably a few real characters. They still employed drivers' mates for some of the runs, especially in Lincoln where there was a lot of barrowing to be done with all the small shops. The regular mate for this run, Dennis Johnson, was a notorious boozer and was once found by the transport manager (who lived on the same street) fast asleep sprawled across his front hedge on a bitterly cold morning, having stumbled back from the Reindeer blind drunk after closing time and failed to negotiate the front gate. If you went out with Dennis, you could guarantee he'd have you park up by Lincoln racecourse for dinner break, and he'd go off gathering mushrooms. Drunk or sober, though, he knew every shop and street in most of the towns and cities, and he was a real grafter too, though slightly lacking in the finer points of diplomacy!.
The company still exists, managed by Andrew Rainbow today who was at the same school as me (Minster Grammar) though a couple of years senior. The yard, though, is now in Newark and the historic Burgage Green site in Southwell is now housing.