Glad to hear (assume) that no one was hurt. Perhaps someone that has an empty table will benefit from the venison, if not your family.
Here's what I'd do, since the vehicle is a keeper. Note that when I say "I did" something (like a t-stat), that I have the 5.3, and the component may be in a different place. Also, I don't think anyone would expect you to do *all* of the things I list below (unless you're independently wealthy - and if that's the case, you're probably not so worried about the TB, right?)
Clutch - convert to a Hayden thermal like the pickups use, and say good-bye to the OEM, which continually fails. GM did, after all, at the end of the 360 run. Get someone like Limeswap to tune out the fan codes, and give your LL8 a tune - he charges discount prices for the 4.2L owners. It'll be like you put a new (more powerful) motor in, and this alone may make you feel like everything was worth doing.
Radiator - get one with a *drain* plug if at all possible. HD cooling may not be needed, but try and get something a little better than stock.
All coolant hoses - upper / lower rad, heater send / return.
New t-stat, especially since you're doing the WP.
New serpentine belt, along with idler / tensioner pulleys
If the radiator cap survived - I'd actually *keep* / reuse it as a small 'reminder' of what happened. Test it, if needed (you can rent a tester at the local parts stores.)
Get a trans cooler, and mount it in front of the new A/C condenser. You can decide whether to put it in series with or bypass the cooler in the rad. Doing it in series with a new radiator allows you to use a smaller cooler (the stacked plate ones are the smallest / most efficient for their size.) Your trans will thank you, even though it wasn't harmed by the deer.
Was the A/C marginal last summer? Was the system evac'd as a result of the condenser getting taken out by the deer? A new compressor may be in order.
New Alternator (I know it's low on the 4.2L, and a pain to get out, normally.
How are those power steering hoses? If original, check carefully for wear (the wear spot tends to be toward the back, but the forward connection points for the hoses may be easier to get to now, at the pump & rack.
Body:
Is your TB an LS, or an LT? If you have an LS, and want the LT-style front, fogs, etc. - now's the time to get those parts. DRL deletes? '6-high' / HID / LED conversions? Now's the time, when you have plenty of room to work / plan out the connections.
Finally...if this is a road you frequent...perhaps a good brush guard for 'the next deer'. Don't bother with a small 'bull bar', etc. - as someone mentioned here a while back, those are damage *multipliers*.
There are probably some sensors the 4.2L has up front on the motor, that I'm not aware of. Pay attention to any advice on these from 4.2L owners.
Any suspension parts nearby (sway bar, bushings, end links, etc.) are game, as well as anything touched while doing the end links (tie rod outers / inners, etc.)
In short, and especially if your TB has a bunch of miles on it - whatever is easier to get to now, do it now. When I had to do my OEM electro-viscous clutch, and converted to a thermal, I replaced WP, t-stat, hoses, alternator, belts, pulleys, because I was either removing it to get to the clutch, or it was right there after the clutch. Spent a little $, but I know (hope) I'm good for the next 100K miles on the truck (w/ regard to those parts, at least)
