[ACT 1] Is it possible to explore the whole map? (light spoilers *may* occur)

[Gyrmadet]

I just explored enough of the Goblin Camp to finish the Druid Halsin quest. When I went back to the Grove, things changed as they were packing for Baldur's Gate . Now, I am a completionist and this is my first run... I don't want to accidentally move to the next act before I searched every nook and cranny.
Trying to be the least spoilery possible, is there any particular action I should avoid to find myself in that situation?

[Furio]

The game will give you a huge warning when you leave. If you still have areas to explore or quests to complete you can turn around then.

[Kernest]

There are two ways to reach act 2, and there is a clear indication of when this is going to happen, so you could go and do the other path before proceeding if you wanted to.

You can also go back to act 1 for most of act 2, though some quests may change/become unavailable if you've gone to act 2.

[strangerfi]

You're stressing yourself playing like that, I myself like to find everything as possible but i'm leaving myself open to missing some things and secrets, even if you tried to do everything in 1 play through, you couldn't. But, as far as act 1 map, I don't see why anything within the map shouldn't be accessible.

[nurby]

You will not complete everything in this game in 1 run just the choices you pick alone will determine how that map or maps will play out. Good run v's Evil run, choices you make and so on.. yeah the main quest will stay true with some changes dependent on the choice you chose. Like everybody said you will get warnings. Just explore the maps and let the game take you on your journey to Baldur's Gate.

[MewTressym]

At minimum you would have to do 3 play throughs to 100% complete the game, given you are willing to not go after every possible ending sequence variation.

You WILL get a huge pop up telling you that you are leaving Act 1 and going in to Act 2 and you can back out at that point.

[Gyrmadet]

okay thanks all

[General Malaise]

I think the way to do it, is to incriminate Kargha before rescuing Halsin.