How do I?

For the first question: you can find vials doing quests that remove all the negative traits you got, there rare, but out there.

The second question is something that I am wondering myself.

Thanks for the answer to no1, I will be on the look out for these vials.

Is there any sort of manual?  Usually you have a forum FAQ for common questions like this.

There has to be some sort of hotkey or something to allow you to leave and rejoin a stack within the same hex, surly something so simple could,'t have been over looked.

Based on my 1 week of experience with the game, you can significantly reduce the damage to your champions by taking the following precautions:

1. Always allow them to recover their hit points completely between fights.
2. Equip them with the basic items of armor you'll collect in the early stages of the game - they need the protection more than your sovereign.
3. Include an expendable unit like spearmen in your army. Combat resolution seems to take out the weakest unit first and work its way up.
4. Not all champions are fighters - read their biography - some are administrators and, my experience thus far indicates if you put them in your city instead of your army, they'll make you tons of money.
5. Before getting into a fight with someone more powerful than you, or an unknown - save the game! This game really needs a quick save button on the main screen!

The Tilda Herbs used to make the restoration potion are quite common in the game - most bear dens seem to have some, but the old woman who knows the recipe for the potion is rare, I'm not sure if there is any way to get the potion other than have her make it for you. Even then it will only heal 1 champion.

Thanks for the advice, I could do with it.  I am on my 3rd game after getting slaughtered on my first two.

Im sure there is a better way to do this but I do it by holding the shift key and selecting all units I want in my group.

Just to clarify; if you click the stack you will see (at the bottom left) which units are on that hex, after that you can select individual units by clicking on their icon. The selected unit will have a thick yellow ring around its icon. You can select more than one unit by holding shift and selecting more units.

Also, if none of the units are selected (no thick yellow rings around any unit icon) then it counts as all of them selected. So ya...  its kinda unintuitive.    

 https://forums.elementalgame.com/

That's right.  But you can get in the situation were those 2 stacks are separate.  clicking the hex brings up only one of those stacks or units.  To have those units rejoin is were the problem comes in.

BTW - Ctrl +S is quick save.

The injuries are a result of the champions being too overpowered in the first beta.   There needed to be some risk to using them as a one man army.  It is still a viable strategy but has the risk of getting them an injury.  

That said, I think there should be a high level spell that removes injuries.

Yeah!!! that is just what I need.  Stardock should have at least give us a list of hotkeys with the game.......cheapskates.

I agree with that just 1 page in the options section or something like that.

Sincerely
~ Kongdej

Darn....Anyone know how I get a caravan for trading?

You don't, caravans are spawned from having a trade treaty, you cannot build them.
(They appear automatically from trade treaties)

Sincerely
~ Kongdej

Oh, right.  That sounds easy enough. Thank you.