Sorry for your loss. I'm actually just down the road in "downtown" Vineland, although I never knew Lance, that I'm aware of.
I'd suggest finding out which items are rare, or worth over a certain amount (either yourself or someone from AtariAge). Sell the items that are worth less in bulk lots, and the more rare/expensive items as singles, either via eBay or AtariAge (AA would be a bit simpler, probably, although you might get a bit less for the items).
I'd consider taking anything worthwhile with you, to sell at your own pace, maybe after additional investigation. If you need, I might be able to act as a middle-man for the more common items, if it's not too overwhelming of a collection. I could help with packing, shipping once the items are sold (with a minimal handling charge probably, depending on the scope).
It's definitely worth your while to at least find out if there are any items that are rare. Some items could be worth significantly more than a lot of the others, and it'd be a shame if you sold it to a local dealer at a cut-rate prices.