No, I would say you are not crazy at all!!! For simple, light overlanding I would say keep it all original - including suspension unless yours is really starting to sag. There is a hell of a lot to be said for the argument that original unmolested = reliability. As for water crossings well you have to be pretty deep to be needing a snorkel - I have one but even after one week in the Okavango and several more weeks in wet areas (incl some pretty hairy crossings) we still could have managed fine without one. General overlanding and trying to avoid trouble you will not need one. Same goes for the winch etc... I have been pulled up for questioning if most overlanders really need proper recovery points etc but I still maintain that for most people on most trips a standard unmodified vehicle is asking for less trouble. Obviously if your suspension is not up to the load then that needs to be sorted. Oh, and for most toyotas you actually need to worry about the relatively low breathers before worrying about the air intake.

My only other 2p worth is General Grabber AT2s. Frankly they are not up to the job, with very weak sidewalls and a short lifetime. On my heavily laden HZJ78 they lasted 11,000kms... On a lighter vehicle with less off road abuse maybe they work for overlanding, but do you really want to? Buy BFG which are tried and tested and mostly loved.

Cheers,
Gil
(internet in the remote parts of Kafue NP in Zambia was an amazing find!)