fvtt-split-journal VS itemcollection

you can just drop the journal with the room description on your map and directly click on it to read the note, a few modules can help (but not needed) :automatic journal icon numbers will automatically add an easy readable number to the journal note icon (the note name has to contain the room number) , Split Journal if you have all your room descriptions in a single journal this will help to split it in single rooms, Pin Cushion will show the note text on mouseover and help with icon placement on the map (this fork fixes some bug with v9.x)

Split Journal

For DND5e, there's a couple options. Item Containers and Inventory+. Both work on v9, neither have been updated for v10. I believe Item Containers will work on it, but Inventory+ won't. Inventory+ has a new repo for v10 that hasn't started work yet if you want to track that. (I do, it's the better option for me.)

Inventory+ and Item collections seem to be the only two choices currently available, and while both could be worked into a useable form, neither plays nice with the tidy5e sheets that I've come to know and love.

Item Collection

you can use the module Item Collection to create containers in your players sheet, it adds also configuration to the container item about how to handle its capacity, max weight, actual item weight (for bags of holding and such where the contained items weight zero) and so on.

This is what you are after - create all type of containers and bags. You can set the fixed weight and anything you put in it wont change the overall weight on your character. Its great. https://foundryvtt.com/packages/itemcollection

I believe the Item Collection module may be what you're looking for. Make sure to check out the GitHubfor additional information.

Thanks for pointing that one out. I think I'll keep an eye on it as it matures. Note this warning from the readme: