@Teyao sorry to hear about your ankle, I hope it heals up soon.
I like option four as well, Undaya blessing grants waterbreathing so we should be able to sneak under the river.
We could also divide into two groups, a ranger, a bruiser and a mage for each, half sneaks into Vallheim and the other half move for reinforcements, Sil should be able to keep us communicated
In option four, Adam could do that and be a distraction through shapeshifting (less bear attack and more along the lines of scaring the enemy away), since James would get his healing magic back.
We can definitely use Sil for distractions (her Loud Screech can distract enemies) and for sending messages. With real enemies approaching, guards aren't going to pay much attention to a bird of prey.