Moving across the country, tips on transporting my vehicles and parts?

I just got back today from interviewing in-person at a company in Georgia (I currently live in Colorado) and I'll most likely take the job if the offer is what I'm looking for. However I have to figure out how to get my 3 vehicles and all my engines and parts transported out there. What do you think is the best way to go about that? Fortunately all my vehicles run and drive. I have my '70 Duster, '72 Dodge pickup and '00 Buick Park Ave. For those I could technically tow the Duster on a trailer with the truck but that's a pretty long way to go, I think the truck would be up to the task but not me LOL. The Buick I'd probably drive out early on with my smaller bare essentials and my cat (pet animal cat, not catalytic converter hahaha).

Then I have all my parts; many boxes of smaller odds and ends like some brake parts, suspension parts, fasteners, engine accessories, electrical but also 2 complete engines (5.7 Hemi and in-progress 440 build), 2 transmissions (one BB 727 and one AX-15 out of a Jeep XJ with the transfer case), an 8 3/4" housing, bare 318 block, 318 crankshaft... In addition to that my interior house stuff like my bed, furniture, desk, clothes etc typical stuff you move from one house to another.

For any of you with a similar stockpile of vehicles and parts who moved cross-country, what was your plan of attack? Also if anything didn't work out as planned, what would you have done differently? I'm fairly certain this company will offer relocation assistance and if so would obviously open up more options that I otherwise might not be able to afford. I also wouldn't necessarily need or want to get ALL of my stuff in one go.