I'm doing a hexcrawl for 4-6 PCs level 7-9 (I did the calculations based on five 8th level PCs). There are 4 "plot" encounters worth 10k each (Copper Dragon, Rakshasa Warlord, Archdruid, Evil Mage). There are 5 "location" encounters worth 10k each (Abandoned Wizards Tower, Forest Ruins, Evil Shrine, Abandoned City, and the Deadlands). So, assuming they finish adventure, that's 90k.
These are the random encounters. They are a mix from easy to deadly; 1/6 of easy and deadly each, 2/6 of hard and medium each (base die is d6). There are 196200 XP worth of random encounters.
Ideally, the party would move up 1 levels over the course of the adventure (plot and location encounters) and up to 2 levels of random encounters (so, that will vary). Treasure would be DMG table coins (about PCs x 10k), PCs x 1 uncommon permanent item, PCs x 3 uncommon consumable, and 1 rare item (BBEG's).
Random Encounters:
Adventurers : Mage (2300) + Gladiator (1800) + Bandit Captain (450) + 2 Priests (900) + Spy (200)
Ankheg Infestation : 7 Ankhegs (3150)
Beast Herd : 5 Elephants (5500)
Centaur Hunters : 5 Centaurs (2250)
Chimera : 2 Chimera (4600)
Crocodile : 2 Giant Crocodiles (3600)
Cyclops : 2 Cyclops (4600)
Demon Wanderer : Glabrezu (5000)
Demon Hunting Party : 1 Yochlol (5900) + 1 Shadow Demon (1100)
Demoted Archdevils : Court Wizard (8400)
Devil Soul Searcher : Erinyes (8400)
Devil Slavers : 2 Bearded Devils (1400) + 4 Imps (800)
Drow Slavers : Drow Elite Warrior (1800) + 9 Drow (450)
Elementals, Air : Air Elementals (1800) + Invisible Stalker (2300)
Elementals, Earth : Earth Elementals (1800) + Xorn (1800)
Elementals, Fire : Fire Elementals (1800) + Salamander (1800)
Naga : 1 Spirit Naga (3900) + 1 Mimic (450)
Gnoll War Band : 1 Gnoll Fang of Yeenoghu (1100) + 2 Gnoll Pack Lords (1800) + 20 Gnolls (2000) + 3 Giant Hyena (300)
Goblin Raiders : 1 Goblin Boss (200) + 9 Goblins (450) + 10 Wolves (500)
Grassland Monsters : 1 Lamia (1100) + 2 Ettins (2200)
Griffons : 5 Griffons (2250)
Hag Coven : 3 Green Hags (5400)
Half Dragon Bounty Hunter : Half Dragon Vet (1800) + 2 Cult Fanatics (900) + 2 Hellhounds (1400)
Haunting : 4 Ghosts (4400)
Hill Giants : 1 Hill Giant (1800) + 2 Dire Wolf (400)
Hydras : Hydra (3900) + Will-o-wisp (450)
The Guardian : Iron Golem (13000)
Kobold Trappers : 12 Winged Kobolds (600) + 20 Kobolds (500)+ 10 Pit Traps (1000)
Lizardfolk Warriors : Lizardfolk Shaman (450) + 12 Lizardfolk (1200)
Carnivorous Dinosaurs : 7 Allosaurs (3150)
Mountain Giants : 2 Stone Giants (5800)
Mountain Monsters : 1 Behir (7200)
Oni Searchers : Oni (2900) + Mage (2300) + Imp (200)
Oozes : 3 Gelatinous Cubes (1350)
Orc War Party : Orc War Chief (1100) + Eye of Gruumsh (450) + 2 Orog (900) + 20 orcs (2000)
Herbivorous Dinosaurs : 6 Anklyosaurus (4200)
Shamblers : Shambling Mound (1800) + 3 Needle Blights (450)
Red Dragons : 1 Young Red Dragon (5900)
Restless Dead : 3 Wights (2100)
Serpent Cultists : 1 Cult Mage (2300) + 1 Cult Gladiator (1800) + 2 Cult Veteran (700) + 2 Cult Fanatics (900)
Shadow Swarms : 10 Shadows (1000)
Swamp Swarm : 10 Swarm of Insects (1000)
Swamp Spiders : 10 Giant Spiders (2000)
Trolls : 2 Trolls (3600)
Undead : 25 Zombies (1250)
Were Outcasts : 2 Wereboars (2200) + 2 Weretigers (2200)
Wolf Pack : 5 Winter Wolves (3500)
Wyverns : 2 Wyvern (4600)