It doesn't really matter if another character is worrying about yours or not. Let Larry take however much time he needs, do his thing, and come back. If Catie had great faith in his abilities and hadn't begun worrying, that's great. Means she thinks he knows what he's doing and that he won't get in over his head. Also, if you're planning on using that as character building time, it would *probably* be okay to post in the bar. Gives you and everyone else here an opportunity to get to know your character better, and that way you'd still have something to work on even though you aren't interacting with anyone else's character. Personally, I find solo posts very hard >.<
I would clear it with Terenia or Luke or someone all official and stuff first though, just in case.