Paul Farquhar
Legend
If the inexperienced DM bans flying characters they will never learn how to accommodate them. Adapting the adventure to suit the players is a key skill any DM needs to learn.What I am saying is that for an inexperienced GM (AKA someone who might buy ToA and run it as-is) an all flying party could be difficult to accommodate. Because of this I think the stance that flying PCs might be overpowered is a fair one for a GM to make.
So, they miss most of the hex crawl. Doesn't matter, if the group creates an all-flying party (with Rope Trick so they don't have to land to rest) it's probably because they aren't interested in hex-crawling and want to get straight on with finding a cure for the Death Curse. Of course, a flying party is going to be conspicuous, and attract the attention of powerful beings known to be in the area. Such as a certain dragon.1. The empty map has very discrete rules for what speed a party moves in the jungle, with a game mechanic tied to if they go fast, normal, and slow. Then it goes on to say flying characters move 4 times faster in an 8 hour day than a "normal" speed party. A group could be starting the hex crawl with the PCs moving 4 times faster overland than the adventure expects them to.
The PCs don't need to care about the fort at all. They might choose to let the conquistadores get eaten by undead dinosaurs. Of course, the person reanimating the dinosaurs might decide to create some undead quezalcoatlus if he hears about flying conquistadors.2. You have a set piece encounter with the PCs defending a fort from rampaging undead dinosaurs. There are zero danger stakes for them if they can just "jump pack" away from dinosaurs and zombies when the going gets tough.
There are dozens of ways a party can bypass the juggernaut. It's almost certainly going to be a trivial encounter. And it doesn't matter.3. There is an encounter about crossing a dangerous bridge with a golem guarding the other side of the PCs don't do it right. Or they just bypass the whole thing.
These are all going to be trivial. Remember the party is going to be at least mid-level by the time the get to these. The are going to have access to flying, familiars, arcane eye, speak with animals, clairvoyance, augury, teleportation etc etc. You planning on banning all of those?4. There is a location with a tricky maze with a prize in the center revealed when the PCs have solved it. Or they just fly by and see what it is without the entire maze portion of the location.
5. There are multiple other locations where height and access from ground level are major problems walking PCs have to solve.