This isn't brain surgery, just the list of cargoes from the Dune Trader supplement, hammered into percentile table form. I attempted to put some weight on the cargoes that a) were listed on the big Trade Route Map from that supplement, or b) I thought merited them.
For a single caravan: My rule of thumb for the moment is d6-2 cargoes (minimum of 1).
1-2 AleGenerating a cargo or two can tell you a lot about the caravan shipping it - whether it's a ponderous mekillot train bearing salt and hardwoods, or a swift crodlu phalanx carrying spices and silver (and maybe some spell components disguised as lunch, who knows?).
3 Amber
4-5 Armor
6-7 Beer
8 Bronze
9 Candy
10-11 Ceramics
12 Chalk
13-14 Chitin
15 Cider
16 Cinnabar
17-18 Cloth
-Common
-Fine
-Rich
19-20 Clothing
21-22 Coal
23-24 Copper
25 Cosmetics
26-27 Cotton
28-29 Crodlu
-Riding
-War
30 Dyes/Pigments
31-32 Erdlu
33 Feathers
-Rare
-Common
34 Figs
35 Fruit
36 Furs
37 Gems
38 Glass
39 Gold
40-41 Hardwood
42-43 Herbs
44 Incense
45 Inix
46 Ink
47-48 Iron
49 Jade
50 Jewelry
51-52 Kanks
-Trained
-Untrained
53 Kank Nectar
54-56 Leather
57 Marble
58 Medicines
59 Mekillots
60 Mirrors
61 Nuts
62-64 Obsidian
65-66 Oil
-Flammable
-Lamp
-Cooking
67 Paintings
68 Paper
69 Perfume
70 Resins
71-72 Rice
73 Rope
-Hemp
-Silk
74 Rugs
75-75 Salt
76 Silk, raw
77 Silver
78-80 Slaves
81 Songbirds
82 Spell books
83 Spell components
84 Spice
-Exotic
-Rare
-Uncommon
85 Statues
86 Sugar
87-88 Tools
89 Vegetables
90-92 Water
93 Wax
94-95 Weapons
96-97 Wine
98-100 Wheat
- DYA