Bonus Mission Pack? Soloable+Heroes?

Are the Missions in the Bonus Mission Pack soloable with just yourself and Heroes/Henchies?

The Bonus Mission Pack quests can only be done alone. You can not have anyone else, human, hench, or hero in your party.

Ahh ok, Should the bonus missions be done at level 20?

I believe you automatically turn level 20 upon entering a bonus mission. If you check the BMP section on wiki it will tell you everything you need to know.

doesn't matter you are not "playing" you are a character in a historical event.

1. you are Gwen escapeing the charr slave camp
2. you are Togo making the peace treaty with the tengu
3. you are Saul beating the charr back from Lion's Arch
4. you are Turia Ossa defeating Palawa Joko

You are at a set level with set skills.

Ya the Wiki answered all my questions.