Sometimes, you don't need an entire base town.
I recently started running one of the adventures from the OSE Adventure Anthology 2 for my young nephew (and others, but the game is primarily to show him the tabletop ropes). Neither of the anthologies come with a town of any kind. Most of the dungeons within are the kinds of low-level affairs where you can roll up new PCs and start them right at the entrance without issue. However, there is enough content here that a trip or two back to a haven to rest and restock seem likely. (Note: The same is even more true for other town-less low-level OSE adventures like A Hole in the Oak or The Incandescent Grottoes).
Given my nephew's unfamiliarity with the expectations of pen-and-paper RPGs, introducing a full base town in the middle of his first real delve could prove distracting. "Hey, there is the inn, and next door is a tavern, and over there is the smithy, and that's the thieves' guild ..." etc. etc. So, I sought an alternative.
One common and entirely valid alternative is to abstract the return to town. You don't need to go into detail regarding the people and places around town, just get in, get some gear, sleep, and get out.
My approach, though, is to offer a taste of town without too much distraction: a small staging post / coaching inn along the road, about half a day from town. Give it some personality so that he can experience a respite from the dungeon without so much to do that he loses momentum.
While I decided upon this approach to cater to a novice player, it could be useful for more experienced players as well. Maybe you want to run an adventure but the referee hasn't come up with a whole town yet. Maybe you aren't sure that you want to turn this adventure into a campaign that even needs a town. Maybe you haven't decided if you'll be going to Illmire or Brandonsford next and you aren't ready to commit.
If you fit into any of the categories above, check out the "A Staging Post" PDF for a small but detailed waypoint with an inn, a store, a few personalities, and some fun secrets. And, if you're interested in my "author's notes," keep reading after the download!