Anita,
You shouldn't have to worry about the altar boys, the priest will take care of that. You'll usually have an hour or two before the wedding to doll up the place, time might be tighter on the weekend, especially if it's booked end to end.
papaya,
If you ask me I'd say it's up to you, personally I'd prefer it if my bride goes solo, just the dad and her and the little 'uns if you got 'em, too many people and I feel like I'm waiting for an entourage not my bride, but that's just me, whatever floats your boat, it's your day, do what YOU like.
Hey esfe,
Here's a thought, why not hold it at your parish church since you can't do it at his? Since you're prepared for a wedding service you might as well make it meaningful in some way and do it at YOUR parish.
Get your HTB to get off his ass and talk to the parish priest about having a wedding at such and such a date at the church, the least he could do is take the lead for this portion of your wedding since he should be more comfortable and/or familiar with what needs to be done. The priests are more than willing to walk you through the process and what you guys need to do.
There's the spiritual side and the more mundane prep like caterers. For the spiritual side, the priest will sit both of you down and run through a series of questions to see how prepared you both are for marriage. He'll also do some admin side stuff like checking on your HTB baptism cert. Other factors you need to take note of are if the church has a place onsite where you could hold the post ceremony reception, also things like arranging for the choir and church deco, these two the priest should have a contact he can recommend to you if you have none. That's it off the top of my head, I'm sure there's more that the others can think of. Do let us know what church YOU belong to if you were Catholic, some of us might have gotten married there and can help more specifically.