7G seems like an awful lot for your first time with them, I think you should consider doing half of that, an 1/8th is a really good starter dose to get the feel for them. That might be about on par with your acid experience. Then you'll still have an 1/8th for later.

In my experience, there is a lot more mental confusion and "mindf**k" with mushrooms. On acid I was usually relatively clear headed, I generally knew who and where I was, and understood why the walls were melting. Even a relatively small amount of shrooms can throw all that right out the window. IMO 7G could actually be dangerous for the unprepared, especially if you're going to be on your own in the woods. But even with a sitter that might be risky. Like potentially a crap your pants and run around all night naked and delirious kind of time. If you do decide to go for more than about 3-4g, be very careful, and bring at least one maybe a couple of sober friends.
As far as ingestion, I like to go gourmet and make mine into part of a fine meal. last time I had some beef and mushroom torteloni, it was delish.

But even something as simple as tossing them in an omlette or spaghetti is good. Or pile them on a pizza. I've also put them into a salad, or onto my subway sammich (which might be a good option for a hike.)
Some people prefer to do them on an empty stomach, trying to make the effect stronger (although I've never noticed a difference personally.) You can just chew them up raw of course, nothing wrong with that. Another way to go is to chop them up and make a tea (try not to boil it), or you could try "lemon tek". Grind them up then soak them in lemon juice for a few hours, then strain out the solids and drink the juice. This is supposed to intensify the experience beyond what you'd get by eating the same amount, so maybe go a bit lighter like 2g. I haven't done this yet personally but it is supposed to shorten the duration of the trip as well.
Good luck, be safe and have fun!