Well, I'll start with the disclaimer that advice you get on the internet may well be worth exactly what you paid for it.
To me, long term assets are held for the long term. Equities, for example, are not held with a two or three year time horizon. Similarly, bonds are bought and expected to be held to maturity.
I don't know what kind of trading frequency you are thinking of here, but inflation is a long-term thing, usually fairly slow moving. So over the short term, the inflation protection that TIPS offer gets you almost nothing.
For the short term (1-3 years or 1-5 years) I buy short-term assets. For example we just had a couple of 3-year brokered CDs coming due. One this week and one next week. Both chunks of money are going into 3-month treasury bills. The first batch we bought over the counter, YTM of 1.17%. I could have had a 3-month brokered CD at 1.2% but 3bps is hardly the price of a good dinner and the bills are easy to trade if I decide on a better home for the money. The second CD pays out about the time of the month-end treasury auction so we are buying treasury bills that way. We also have a bunch of cash in a floating-rate fund, SAMBX, that has been paying around 3% IIRC. A little more risk, a little more reward.
So if you want to trade TIPS and try to make some money, I can't suggest how to do it and I'm pretty sure it will be losing endeavor anyway. If you are buying and selling to manage a cash flow, then my tactic would be short term stuff like money markets, t-bills, and t-notes. A short-term treasury fund would work, too, but for us these transactions are well into six figures and I'd rather avoid paying someone to do a stupid-simple task, buying govvies, I can do myself.