A photo of the worms/larvae would help a lot. Could be FFs or drain flies -- you can look up photos to see if either of those look familiar. Intestinal worms look like worms (not like maggots).
Some things worth mentioning:
Having a vet lined up (i.e. being in their client database) is a very good idea. This way when (not if) a problem does crop up, you're not some rando with an emergency that they will not want to bump their established clients for. A good way to get that connection started might be to get your collection tested for intestinal parasites (which this probably isn't, but it would be a fine excuse to introduce your collection to a vet).
Controlling pathogen vectors in a collection should be a priority (even if the animals were all properly QTed and pathogen tested, which seems less than likely if there's no vet connection). Insect problems are worth more than a couple vinegar traps, especially if the health status of the animals in the collection is mostly an unknown. Completely eliminating/sealing off food sources for the insects (human food, animal food, trash, drains) and engaging in some serious general cleaning helps a lot. Most of the remainder can be caught with a lot of sticky traps (I like these for under enclosure vents to catch insects as they're crawling to or from the vents: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 )