I was wondering if you ever received any additional information on the experience of the 2nd regiment as I too have 3 ancestors in it. My folks did not appear on the land bounty list however.
Interestingly a book I started began on page one relating a letter from Col Hays to Genl Nathaniel Greene complaining about his men in the seocnd regiemnt. The book is called The Winter Soldiers. As you can imagine, I was shocked to see something about my ancestors' regiment right at the outset of this book. The Col's complaints were about not getting his men to show up regularly and about their desire to go home to put in their crops or check on their crops.
I'd be interested to share anything I have which might help.