If its a Honda definitely do everything you listed. Cam seals will start leaking on a Honda around 100K miles. Crank seals, balance shaft seals as well. Valve Cover gasket is a DIY so don’t work about that now. Head gasket I wouldn;t worry about either even on an H22a. As Don said earlier, when the other seals start leaking, like the Cam seals the little bit of oil will leak off and drip down inside your timing cover, getting oil on the belt. Then you will start noticing a drip spot the size of a dime on the ground directly beneath the lower timing belt cover.
I suggest you buy all OEM parts go to www.majestichonda.com
parts are very inexpensive all OEM. I buy all my Honda parts from them.
Reason I say this is, on my mothers, now my sisters 1995 Accord V6 we had the H20 and water pump replaced around 55-60K miles like Honda recommended. We had at done at a shop, that didn’t use Honda parts. 13 months later (right out of the 12 month/12K parts and labor warrenty) the water pump started leaking. The $18 water pump was covered, we paid another $380 in labor though. Retarded.