If it were me I would (assuming I was equally familliar with all calibers listed) take the 338WM and the 300WM (or 7x57 if I was feeling nostalgic) if I just had to have 2 rifles. Personally I would just bring one rifle (after making sure there was a good loaner available just in case). The 338 would go and maybe a shotgun for some wingshooting. The 300 WM would do just as well, I just really like the 338. Or just take your favorite one that is big enough to do the job. I wouldn't take anything smaller then the 7x57 and preferably bigger than or equal to 30 cal.