I'm still a big fan of Nordstrom non-iron shirts. Traditional look, multiple sizes and cuts, around $60 not on sale and maybe below $40 when on sale.

I've recently found Wool & Prince shirts. I think they stand up to packing better than any shirt I've found. Minimum wrinkles, even after bundle packing. Contrasted with the Nordstrom shirts, even the solid-color button down shirts might be considered slightly casual Friday looking although I believe they can be worn as dress shirts. They also trend towards trim-fit styles, which can make it difficult to find a correct size. I'm no longer trim fit, found the large to fit my midsection properly but the sleeves maybe a half-inch too long. And at $128 for dress shirts/$98 for polos, with apparently infrequent sales/discounts, much more expensive than Nordstrom.

But, with all those reservations, I can corroborate almost all the other claims they make on their website. I wore the shirt at least 10 times before cleaning and only cleaned it because of a significant stain, which came out without a trace. The claim of 100 wearings between cleanings at the website is probably partially related to San Francisco's cooler and bearably humid climate--as opposed to an East Coast summer. The merino wool fabric is comfortable, not itchy at all, and undoubtedly contributes to the odor release and wrinkle resistance the shirt has.

The price is a bit prohibitive and you're much better off if you fit their trim-fit ideal, but I'm tempted to order a few polo shirts based on my experience so far.

In regards to pants, I've found the Croft & Barrow brand traveler pants at Kohl's to be very good. Listed at around $60, their regular sales bring the price to around $30. Multiple colors and cuffed/noncuffed--pleated/nonpleated styles. I'm not a big fan of polyester generally but there's no denying that the current generation of microfiber works really well for pants that will get packed on a regular basis.