I know my objectives and I know them well: In the course of a week, I must find a way to be able to travel between Gensokyo and here freely after those seven days have passed. At least one, but more entrance/exit points will be better.
The things I would carry are:
>A short iron golf club, as a basic line of defense.
>A rattan stick, another basic line of defense, and also for other uses.
>A whetstone
>A small and basic medkit, which includes medicines I need for my conditions
>Enough clothes to last me more than a week
>Some bar soap
>A couple bottles of shampoo
>Polarized sunglasses
>Mechanical pencil and leads
>Rubber eraser
>A couple ballpens
>Some short A4 size-papers
>Three rulers of various styles
>A notebook
>Some ointments for muscle pains and cramps
>A few bandanas
>A small plastic jar of candies in different flavors
Despite this long list, this is actually very light to carry, you know?
My starting point: Hakurei Shrine, in the middle of the day, inside the shrine itself, when Reimu is there but not looking. The better scenario will be when many people are there and nobody's looking just for a split second, then I appear, just like that, sitting in the middle of the shrine housing. Talking about dynamic entry.
Of course, I chose this place to appear because, one, Marisa is more likely to be there. Two, she can't lie to me that she's Reimu, as she usually does. Three, it seems to be a hub for the other characters in Gensokyo, so yeah.
Upon seeing Marisa, I would at first banter with her. By then, I'll slowly reveal the cause and conditions of my stay there. And then be affectionate with her while I'm finding a way. I want to convince her that I'm here because of her, and I want us to be together, as well as get her heart too. If do that, I will get her by my side. I might as well as then actually achieve my stated objective, by then.