I don't find the milkweed bugs on the Giant Milkweed but it does get spider mites (white webby stuff) often. Also the butterflies do not lay on it very often when the other is present but they will eat it and so it is helpful to have when you run out of the regular. I have the orange red type but I prefer the Silky gold with yellow flowers. Still have the aphids and milkweed bugs on it. Don't know about the vine. I think I have it as a volunteer but never see anything on it. I am in zone 9 Lakeland.

I have the scarlet and the gold.The monarchs seem to like the scarlet/yellow best. Recently purchased a Giant milkweed and notice they leave a much brighter green frass from eating that. I have not noticed aphids on it but they do love the others.I squish the tiny yellow ahids but lady bugs have been doing a pretty good job keeping them under control. When the big orange bugs get noticable I take a bowl of soapy water and after making sure there are no caterpillars on the milkweed I flick the buggers into the water, the soap penetrates them and they die.If you only use water they will just crawl out.I also have just got some Swan milkweed from a web-ber from Texas so I will see how they do.Gardening without chemicals is REALLY hands on but it gives you a chance to check out every inch of your garden.
Its what I refer to as PLANT PARENTHOOD!

I haven't noticed any aphids or anything on my giant milkweed. I have the native milkweed growing wild here, but the aphids like it too and also I've never seen the monarchs eating it.

In the past I've had a lot of trouble with aphids on my milkweed so this year I bought a bunch of ladybugs and released them in the yard. They did a fantastic job of keeping the aphids under control. As for the orange bugs I just knock them off and step on them whenever I see them.

I have both the yellow mikweed and the yellow and orange milkweed and the monarchs are quick to strip them down to stalks. Then they start to eat the stalks as well!